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gstreamer/gst-libs/gst/vaapi/gstvaapidecoder_h264.c
Gwenole Beauchesne cb0da4ed7a h264: fix picture size in macroblocks. 
The picture size signalled by sps->{width,height} is the actual size with
cropping applied, not the original size derived from pic_width_in_mbs_minus1
and pic_height_in_map_units_minus1. VA driver expects that original size,
uncropped.

There is another issue pending: frame cropping information needs to be
taken care of.
2012-11-16 18:05:28 +01:00

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/*
* gstvaapidecoder_h264.c - H.264 decoder
*
* Copyright (C) 2011-2012 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* SECTION:gstvaapidecoder_h264
* @short_description: H.264 decoder
*/
#include "sysdeps.h"
#include <string.h>
#include <gst/base/gstadapter.h>
#include <gst/codecparsers/gsth264parser.h>
#include "gstvaapidecoder_h264.h"
#include "gstvaapidecoder_objects.h"
#include "gstvaapidecoder_priv.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapiobject_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
/* Defined to 1 if strict ordering of DPB is needed. Only useful for debug */
#define USE_STRICT_DPB_ORDERING 0
typedef struct _GstVaapiFrameStore GstVaapiFrameStore;
typedef struct _GstVaapiFrameStoreClass GstVaapiFrameStoreClass;
typedef struct _GstVaapiPictureH264 GstVaapiPictureH264;
typedef struct _GstVaapiPictureH264Class GstVaapiPictureH264Class;
typedef struct _GstVaapiSliceH264 GstVaapiSliceH264;
typedef struct _GstVaapiSliceH264Class GstVaapiSliceH264Class;
// Used for field_poc[]
#define TOP_FIELD 0
#define BOTTOM_FIELD 1
/* ------------------------------------------------------------------------- */
/* --- H.264 Pictures --- */
/* ------------------------------------------------------------------------- */
#define GST_VAAPI_TYPE_PICTURE_H264 \
(gst_vaapi_picture_h264_get_type())
#define GST_VAAPI_PICTURE_H264_CAST(obj) \
((GstVaapiPictureH264 *)(obj))
#define GST_VAAPI_PICTURE_H264(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
GST_VAAPI_TYPE_PICTURE_H264, \
GstVaapiPictureH264))
#define GST_VAAPI_PICTURE_H264_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), \
GST_VAAPI_TYPE_PICTURE_H264, \
GstVaapiPictureH264Class))
#define GST_VAAPI_IS_PICTURE_H264(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_VAAPI_TYPE_PICTURE_H264))
#define GST_VAAPI_IS_PICTURE_H264_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_PICTURE_H264))
#define GST_VAAPI_PICTURE_H264_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj), \
GST_VAAPI_TYPE_PICTURE_H264, \
GstVaapiPictureH264Class))
/*
* Extended picture flags:
*
* @GST_VAAPI_PICTURE_FLAG_IDR: flag that specifies an IDR picture
* @GST_VAAPI_PICTURE_FLAG_SHORT_TERM_REFERENCE: flag that specifies
* "used for short-term reference"
* @GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE: flag that specifies
* "used for long-term reference"
* @GST_VAAPI_PICTURE_FLAGS_REFERENCE: mask covering any kind of
* reference picture (short-term reference or long-term reference)
*/
enum {
GST_VAAPI_PICTURE_FLAG_IDR = (GST_VAAPI_PICTURE_FLAG_LAST << 0),
GST_VAAPI_PICTURE_FLAG_SHORT_TERM_REFERENCE = (
GST_VAAPI_PICTURE_FLAG_REFERENCE),
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE = (
GST_VAAPI_PICTURE_FLAG_REFERENCE | (GST_VAAPI_PICTURE_FLAG_LAST << 1)),
GST_VAAPI_PICTURE_FLAGS_REFERENCE = (
GST_VAAPI_PICTURE_FLAG_SHORT_TERM_REFERENCE |
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE),
};
#define GST_VAAPI_PICTURE_IS_IDR(picture) \
(GST_VAAPI_PICTURE_FLAG_IS_SET(picture, GST_VAAPI_PICTURE_FLAG_IDR))
#define GST_VAAPI_PICTURE_IS_SHORT_TERM_REFERENCE(picture) \
((GST_VAAPI_PICTURE_FLAGS(picture) & \
GST_VAAPI_PICTURE_FLAGS_REFERENCE) == \
GST_VAAPI_PICTURE_FLAG_SHORT_TERM_REFERENCE)
#define GST_VAAPI_PICTURE_IS_LONG_TERM_REFERENCE(picture) \
((GST_VAAPI_PICTURE_FLAGS(picture) & \
GST_VAAPI_PICTURE_FLAGS_REFERENCE) == \
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE)
struct _GstVaapiPictureH264 {
GstVaapiPicture base;
GstH264PPS *pps;
guint structure;
gint32 field_poc[2];
gint32 frame_num; // Original frame_num from slice_header()
gint32 frame_num_wrap; // Temporary for ref pic marking: FrameNumWrap
gint32 long_term_frame_idx; // Temporary for ref pic marking: LongTermFrameIdx
gint32 pic_num; // Temporary for ref pic marking: PicNum
gint32 long_term_pic_num; // Temporary for ref pic marking: LongTermPicNum
GstVaapiPictureH264 *other_field; // Temporary for ref pic marking: other field in the same frame store
guint output_flag : 1;
guint output_needed : 1;
};
struct _GstVaapiPictureH264Class {
/*< private >*/
GstVaapiPictureClass parent_class;
};
GST_VAAPI_CODEC_DEFINE_TYPE(GstVaapiPictureH264,
gst_vaapi_picture_h264,
GST_VAAPI_TYPE_PICTURE)
static void
gst_vaapi_picture_h264_destroy(GstVaapiPictureH264 *decoder)
{
}
static gboolean
gst_vaapi_picture_h264_create(
GstVaapiPictureH264 *picture,
const GstVaapiCodecObjectConstructorArgs *args
)
{
return TRUE;
}
static void
gst_vaapi_picture_h264_init(GstVaapiPictureH264 *picture)
{
picture->field_poc[0] = G_MAXINT32;
picture->field_poc[1] = G_MAXINT32;
picture->output_needed = FALSE;
}
static inline GstVaapiPictureH264 *
gst_vaapi_picture_h264_new(GstVaapiDecoderH264 *decoder)
{
GstVaapiCodecObject *object;
g_return_val_if_fail(GST_VAAPI_IS_DECODER(decoder), NULL);
object = gst_vaapi_codec_object_new(
GST_VAAPI_TYPE_PICTURE_H264,
GST_VAAPI_CODEC_BASE(decoder),
NULL, sizeof(VAPictureParameterBufferH264),
NULL, 0
);
if (!object)
return NULL;
return GST_VAAPI_PICTURE_H264_CAST(object);
}
static inline void
gst_vaapi_picture_h264_set_reference(
GstVaapiPictureH264 *picture,
guint reference_flags,
gboolean other_field
)
{
g_return_if_fail(GST_VAAPI_IS_PICTURE_H264(picture));
GST_VAAPI_PICTURE_FLAG_UNSET(picture, GST_VAAPI_PICTURE_FLAGS_REFERENCE);
GST_VAAPI_PICTURE_FLAG_SET(picture, reference_flags);
if (!other_field || !(picture = picture->other_field))
return;
GST_VAAPI_PICTURE_FLAG_UNSET(picture, GST_VAAPI_PICTURE_FLAGS_REFERENCE);
GST_VAAPI_PICTURE_FLAG_SET(picture, reference_flags);
}
static inline GstVaapiPictureH264 *
gst_vaapi_picture_h264_new_field(GstVaapiPictureH264 *picture)
{
GstVaapiPicture *base_picture;
g_return_val_if_fail(GST_VAAPI_IS_PICTURE_H264(picture), NULL);
base_picture = gst_vaapi_picture_new_field(&picture->base);
if (!base_picture)
return NULL;
return GST_VAAPI_PICTURE_H264_CAST(base_picture);
}
static inline GstVaapiSliceH264 *
gst_vaapi_picture_h264_get_last_slice(GstVaapiPictureH264 *picture)
{
g_return_val_if_fail(GST_VAAPI_IS_PICTURE_H264(picture), NULL);
if (G_UNLIKELY(picture->base.slices->len < 1))
return NULL;
return g_ptr_array_index(picture->base.slices,
picture->base.slices->len - 1);
}
/* ------------------------------------------------------------------------- */
/* --- Slices --- */
/* ------------------------------------------------------------------------- */
#define GST_VAAPI_TYPE_SLICE_H264 \
(gst_vaapi_slice_h264_get_type())
#define GST_VAAPI_SLICE_H264_CAST(obj) \
((GstVaapiSliceH264 *)(obj))
#define GST_VAAPI_SLICE_H264(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
GST_VAAPI_TYPE_SLICE_H264, \
GstVaapiSliceH264))
#define GST_VAAPI_SLICE_H264_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), \
GST_VAAPI_TYPE_SLICE_H264, \
GstVaapiSliceH264Class))
#define GST_VAAPI_IS_SLICE_H264(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_VAAPI_TYPE_SLICE_H264))
#define GST_VAAPI_IS_SLICE_H264_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_SLICE_H264))
#define GST_VAAPI_SLICE_H264_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj), \
GST_VAAPI_TYPE_SLICE_H264, \
GstVaapiSliceH264Class))
struct _GstVaapiSliceH264 {
GstVaapiSlice base;
GstH264SliceHdr slice_hdr; // parsed slice_header()
};
struct _GstVaapiSliceH264Class {
/*< private >*/
GstVaapiSliceClass parent_class;
};
GST_VAAPI_CODEC_DEFINE_TYPE(GstVaapiSliceH264,
gst_vaapi_slice_h264,
GST_VAAPI_TYPE_SLICE)
static void
gst_vaapi_slice_h264_destroy(GstVaapiSliceH264 *slice)
{
}
static gboolean
gst_vaapi_slice_h264_create(
GstVaapiSliceH264 *slice,
const GstVaapiCodecObjectConstructorArgs *args
)
{
return TRUE;
}
static void
gst_vaapi_slice_h264_init(GstVaapiSliceH264 *slice)
{
}
static inline GstVaapiSliceH264 *
gst_vaapi_slice_h264_new(
GstVaapiDecoderH264 *decoder,
const guint8 *data,
guint data_size
)
{
GstVaapiCodecObject *object;
g_return_val_if_fail(GST_VAAPI_IS_DECODER(decoder), NULL);
object = gst_vaapi_codec_object_new(
GST_VAAPI_TYPE_SLICE_H264,
GST_VAAPI_CODEC_BASE(decoder),
NULL, sizeof(VASliceParameterBufferH264),
data, data_size
);
if (!object)
return NULL;
return GST_VAAPI_SLICE_H264_CAST(object);
}
/* ------------------------------------------------------------------------- */
/* --- Frame Buffers (DPB) --- */
/* ------------------------------------------------------------------------- */
#define GST_VAAPI_TYPE_FRAME_STORE \
(gst_vaapi_frame_store_get_type())
#define GST_VAAPI_FRAME_STORE_CAST(obj) \
((GstVaapiFrameStore *)(obj))
#define GST_VAAPI_FRAME_STORE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
GST_VAAPI_TYPE_FRAME_STORE, \
GstVaapiFrameStore))
#define GST_VAAPI_FRAME_STORE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), \
GST_VAAPI_TYPE_FRAME_STORE, \
GstVaapiFrameStoreClass))
#define GST_VAAPI_IS_FRAME_STORE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_VAAPI_TYPE_FRAME_STORE))
#define GST_VAAPI_IS_FRAME_STORE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_FRAME_STORE))
#define GST_VAAPI_FRAME_STORE_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj), \
GST_VAAPI_TYPE_FRAME_STORE, \
GstVaapiFrameStoreClass))
struct _GstVaapiFrameStore {
/*< private >*/
GstMiniObject parent_instance;
guint structure;
GstVaapiPictureH264 *buffers[2];
guint num_buffers;
guint output_needed;
};
struct _GstVaapiFrameStoreClass {
/*< private >*/
GstMiniObjectClass parent_class;
};
G_DEFINE_TYPE(GstVaapiFrameStore, gst_vaapi_frame_store, GST_TYPE_MINI_OBJECT)
static void
gst_vaapi_frame_store_finalize(GstMiniObject *object)
{
GstVaapiFrameStore * const fs = GST_VAAPI_FRAME_STORE_CAST(object);
GstMiniObjectClass *parent_class;
guint i;
for (i = 0; i < fs->num_buffers; i++)
gst_vaapi_picture_replace(&fs->buffers[i], NULL);
parent_class = GST_MINI_OBJECT_CLASS(gst_vaapi_frame_store_parent_class);
if (parent_class->finalize)
parent_class->finalize(object);
}
static void
gst_vaapi_frame_store_init(GstVaapiFrameStore *fs)
{
}
static void
gst_vaapi_frame_store_class_init(GstVaapiFrameStoreClass *klass)
{
GstMiniObjectClass * const object_class = GST_MINI_OBJECT_CLASS(klass);
object_class->finalize = gst_vaapi_frame_store_finalize;
}
static inline gpointer
_gst_vaapi_frame_store_new(void)
{
return gst_mini_object_new(GST_VAAPI_TYPE_FRAME_STORE);
}
static GstVaapiFrameStore *
gst_vaapi_frame_store_new(GstVaapiPictureH264 *picture)
{
GstVaapiFrameStore *fs;
g_return_val_if_fail(GST_VAAPI_IS_PICTURE_H264(picture), NULL);
fs = _gst_vaapi_frame_store_new();
if (!fs)
return NULL;
fs->structure = picture->structure;
fs->buffers[0] = gst_vaapi_picture_ref(picture);
fs->num_buffers = 1;
fs->output_needed = picture->output_needed;
return fs;
}
static gboolean
gst_vaapi_frame_store_add(GstVaapiFrameStore *fs, GstVaapiPictureH264 *picture)
{
guint field;
g_return_val_if_fail(GST_VAAPI_IS_FRAME_STORE(fs), FALSE);
g_return_val_if_fail(fs->num_buffers == 1, FALSE);
g_return_val_if_fail(GST_VAAPI_IS_PICTURE_H264(picture), FALSE);
g_return_val_if_fail(!GST_VAAPI_PICTURE_IS_FRAME(picture), FALSE);
gst_vaapi_picture_replace(&fs->buffers[fs->num_buffers++], picture);
if (picture->output_flag) {
picture->output_needed = TRUE;
fs->output_needed++;
}
fs->structure = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
field = picture->structure == GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD ?
TOP_FIELD : BOTTOM_FIELD;
g_return_val_if_fail(fs->buffers[0]->field_poc[field] == G_MAXINT32, FALSE);
fs->buffers[0]->field_poc[field] = picture->field_poc[field];
g_return_val_if_fail(picture->field_poc[!field] == G_MAXINT32, FALSE);
picture->field_poc[!field] = fs->buffers[0]->field_poc[!field];
return TRUE;
}
static gboolean
gst_vaapi_frame_store_split_fields(GstVaapiFrameStore *fs)
{
GstVaapiPictureH264 * const first_field = fs->buffers[0];
GstVaapiPictureH264 *second_field;
g_return_val_if_fail(fs->num_buffers == 1, FALSE);
first_field->base.structure = GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD;
GST_VAAPI_PICTURE_FLAG_SET(first_field, GST_VAAPI_PICTURE_FLAG_INTERLACED);
second_field = gst_vaapi_picture_h264_new_field(first_field);
if (!second_field)
return FALSE;
gst_vaapi_picture_replace(&fs->buffers[fs->num_buffers++], second_field);
gst_vaapi_picture_unref(second_field);
second_field->frame_num = first_field->frame_num;
second_field->field_poc[0] = first_field->field_poc[0];
second_field->field_poc[1] = first_field->field_poc[1];
second_field->output_flag = first_field->output_flag;
if (second_field->output_flag) {
second_field->output_needed = TRUE;
fs->output_needed++;
}
return TRUE;
}
static inline gboolean
gst_vaapi_frame_store_has_frame(GstVaapiFrameStore *fs)
{
return fs->structure == GST_VAAPI_PICTURE_STRUCTURE_FRAME;
}
static inline gboolean
gst_vaapi_frame_store_has_reference(GstVaapiFrameStore *fs)
{
guint i;
for (i = 0; i < fs->num_buffers; i++) {
if (GST_VAAPI_PICTURE_IS_REFERENCE(fs->buffers[i]))
return TRUE;
}
return FALSE;
}
#define gst_vaapi_frame_store_ref(fs) \
gst_mini_object_ref(GST_MINI_OBJECT(fs))
#define gst_vaapi_frame_store_unref(fs) \
gst_mini_object_unref(GST_MINI_OBJECT(fs))
#define gst_vaapi_frame_store_replace(old_fs_p, new_fs) \
gst_mini_object_replace((GstMiniObject **)(old_fs_p), \
(GstMiniObject *)(new_fs))
/* ------------------------------------------------------------------------- */
/* --- H.264 Decoder --- */
/* ------------------------------------------------------------------------- */
G_DEFINE_TYPE(GstVaapiDecoderH264,
gst_vaapi_decoder_h264,
GST_VAAPI_TYPE_DECODER)
#define GST_VAAPI_DECODER_H264_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), \
GST_VAAPI_TYPE_DECODER_H264, \
GstVaapiDecoderH264Private))
struct _GstVaapiDecoderH264Private {
GstAdapter *adapter;
GstH264NalParser *parser;
/* Last decoded SPS. May not be the last activated one. Just here because
it may not fit stack memory allocation in decode_sps() */
GstH264SPS last_sps;
/* Last decoded PPS. May not be the last activated one. Just here because
it may not fit stack memory allocation in decode_pps() */
GstH264PPS last_pps;
GstVaapiPictureH264 *current_picture;
GstVaapiFrameStore *prev_frame;
GstVaapiFrameStore *dpb[16];
guint dpb_count;
guint dpb_size;
GstVaapiProfile profile;
GstVaapiEntrypoint entrypoint;
GstVaapiChromaType chroma_type;
GstVaapiPictureH264 *short_ref[32];
guint short_ref_count;
GstVaapiPictureH264 *long_ref[32];
guint long_ref_count;
GstVaapiPictureH264 *RefPicList0[32];
guint RefPicList0_count;
GstVaapiPictureH264 *RefPicList1[32];
guint RefPicList1_count;
guint nal_length_size;
guint mb_width;
guint mb_height;
gint32 field_poc[2]; // 0:TopFieldOrderCnt / 1:BottomFieldOrderCnt
gint32 poc_msb; // PicOrderCntMsb
gint32 poc_lsb; // pic_order_cnt_lsb (from slice_header())
gint32 prev_poc_msb; // prevPicOrderCntMsb
gint32 prev_poc_lsb; // prevPicOrderCntLsb
gint32 frame_num_offset; // FrameNumOffset
gint32 frame_num; // frame_num (from slice_header())
gint32 prev_frame_num; // prevFrameNum
gboolean prev_pic_has_mmco5; // prevMmco5Pic
gboolean prev_pic_structure; // previous picture structure
guint is_constructed : 1;
guint is_opened : 1;
guint is_avc : 1;
guint got_sps : 1;
guint got_pps : 1;
guint has_context : 1;
guint progressive_sequence : 1;
};
static gboolean
exec_ref_pic_marking(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture);
/* Get number of reference frames to use */
static guint
get_max_dec_frame_buffering(GstH264SPS *sps)
{
guint max_dec_frame_buffering, MaxDpbMbs, PicSizeMbs;
/* Table A-1 - Level limits */
switch (sps->level_idc) {
case 10: MaxDpbMbs = 396; break;
case 11: MaxDpbMbs = 900; break;
case 12: MaxDpbMbs = 2376; break;
case 13: MaxDpbMbs = 2376; break;
case 20: MaxDpbMbs = 2376; break;
case 21: MaxDpbMbs = 4752; break;
case 22: MaxDpbMbs = 8100; break;
case 30: MaxDpbMbs = 8100; break;
case 31: MaxDpbMbs = 18000; break;
case 32: MaxDpbMbs = 20480; break;
case 40: MaxDpbMbs = 32768; break;
case 41: MaxDpbMbs = 32768; break;
case 42: MaxDpbMbs = 34816; break;
case 50: MaxDpbMbs = 110400; break;
case 51: MaxDpbMbs = 184320; break;
default:
g_assert(0 && "unhandled level");
break;
}
PicSizeMbs = ((sps->pic_width_in_mbs_minus1 + 1) *
(sps->pic_height_in_map_units_minus1 + 1) *
(sps->frame_mbs_only_flag ? 1 : 2));
max_dec_frame_buffering = MaxDpbMbs / PicSizeMbs;
/* VUI parameters */
if (sps->vui_parameters_present_flag) {
GstH264VUIParams * const vui_params = &sps->vui_parameters;
if (vui_params->bitstream_restriction_flag)
max_dec_frame_buffering = vui_params->max_dec_frame_buffering;
else {
switch (sps->profile_idc) {
case 44: // CAVLC 4:4:4 Intra profile
case 86: // Scalable High profile
case 100: // High profile
case 110: // High 10 profile
case 122: // High 4:2:2 profile
case 244: // High 4:4:4 Predictive profile
if (sps->constraint_set3_flag)
max_dec_frame_buffering = 0;
break;
}
}
}
if (max_dec_frame_buffering > 16)
max_dec_frame_buffering = 16;
else if (max_dec_frame_buffering < sps->num_ref_frames)
max_dec_frame_buffering = sps->num_ref_frames;
return MAX(1, max_dec_frame_buffering);
}
static void
array_remove_index_fast(void *array, guint *array_length_ptr, guint index)
{
gpointer * const entries = array;
guint num_entries = *array_length_ptr;
g_return_if_fail(index < num_entries);
if (index != --num_entries)
entries[index] = entries[num_entries];
entries[num_entries] = NULL;
*array_length_ptr = num_entries;
}
#if 1
static inline void
array_remove_index(void *array, guint *array_length_ptr, guint index)
{
array_remove_index_fast(array, array_length_ptr, index);
}
#else
static void
array_remove_index(void *array, guint *array_length_ptr, guint index)
{
gpointer * const entries = array;
const guint num_entries = *array_length_ptr - 1;
guint i;
g_return_if_fail(index <= num_entries);
for (i = index; i < num_entries; i++)
entries[i] = entries[i + 1];
entries[num_entries] = NULL;
*array_length_ptr = num_entries;
}
#endif
#define ARRAY_REMOVE_INDEX(array, index) \
array_remove_index(array, &array##_count, index)
static void
dpb_remove_index(GstVaapiDecoderH264 *decoder, guint index)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i, num_frames = --priv->dpb_count;
if (USE_STRICT_DPB_ORDERING) {
for (i = index; i < num_frames; i++)
gst_vaapi_frame_store_replace(&priv->dpb[i], priv->dpb[i + 1]);
}
else if (index != num_frames)
gst_vaapi_frame_store_replace(&priv->dpb[index], priv->dpb[num_frames]);
gst_vaapi_frame_store_replace(&priv->dpb[num_frames], NULL);
}
static gboolean
dpb_output(
GstVaapiDecoderH264 *decoder,
GstVaapiFrameStore *fs,
GstVaapiPictureH264 *picture
)
{
picture->output_needed = FALSE;
if (fs) {
if (--fs->output_needed > 0)
return TRUE;
picture = fs->buffers[0];
}
/* XXX: update cropping rectangle */
return gst_vaapi_picture_output(GST_VAAPI_PICTURE_CAST(picture));
}
static inline void
dpb_evict(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture, guint i)
{
GstVaapiFrameStore * const fs = decoder->priv->dpb[i];
if (!fs->output_needed && !gst_vaapi_frame_store_has_reference(fs))
dpb_remove_index(decoder, i);
}
static gboolean
dpb_bump(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 *found_picture = NULL;
guint i, j, found_index;
gboolean success;
for (i = 0; i < priv->dpb_count; i++) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (!fs->output_needed)
continue;
for (j = 0; j < fs->num_buffers; j++) {
GstVaapiPictureH264 * const picture = fs->buffers[j];
if (!picture->output_needed)
continue;
if (!found_picture || found_picture->base.poc > picture->base.poc)
found_picture = picture, found_index = i;
}
}
if (!found_picture)
return FALSE;
success = dpb_output(decoder, priv->dpb[found_index], found_picture);
dpb_evict(decoder, found_picture, found_index);
return success;
}
static void
dpb_clear(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i;
for (i = 0; i < priv->dpb_count; i++)
gst_vaapi_frame_store_replace(&priv->dpb[i], NULL);
priv->dpb_count = 0;
gst_vaapi_frame_store_replace(&priv->prev_frame, NULL);
}
static void
dpb_flush(GstVaapiDecoderH264 *decoder)
{
while (dpb_bump(decoder))
;
dpb_clear(decoder);
}
static gboolean
dpb_add(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiFrameStore *fs;
guint i, j;
// Remove all unused pictures
if (!GST_VAAPI_PICTURE_IS_IDR(picture)) {
i = 0;
while (i < priv->dpb_count) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (!fs->output_needed && !gst_vaapi_frame_store_has_reference(fs))
dpb_remove_index(decoder, i);
else
i++;
}
}
// Check if picture is the second field and the first field is still in DPB
fs = priv->prev_frame;
if (fs && !gst_vaapi_frame_store_has_frame(fs)) {
g_return_val_if_fail(fs->num_buffers == 1, FALSE);
g_return_val_if_fail(!GST_VAAPI_PICTURE_IS_FRAME(picture), FALSE);
g_return_val_if_fail(!GST_VAAPI_PICTURE_IS_FIRST_FIELD(picture), FALSE);
return gst_vaapi_frame_store_add(fs, picture);
}
// Create new frame store, and split fields if necessary
fs = gst_vaapi_frame_store_new(picture);
if (!fs)
return FALSE;
gst_vaapi_frame_store_replace(&priv->prev_frame, fs);
gst_vaapi_frame_store_unref(fs);
if (!priv->progressive_sequence && gst_vaapi_frame_store_has_frame(fs)) {
if (!gst_vaapi_frame_store_split_fields(fs))
return FALSE;
}
// C.4.5.1 - Storage and marking of a reference decoded picture into the DPB
if (GST_VAAPI_PICTURE_IS_REFERENCE(picture)) {
while (priv->dpb_count == priv->dpb_size) {
if (!dpb_bump(decoder))
return FALSE;
}
gst_vaapi_frame_store_replace(&priv->dpb[priv->dpb_count++], fs);
if (picture->output_flag) {
picture->output_needed = TRUE;
fs->output_needed++;
}
}
// C.4.5.2 - Storage and marking of a non-reference decoded picture into the DPB
else {
if (!picture->output_flag)
return TRUE;
while (priv->dpb_count == priv->dpb_size) {
gboolean found_picture = FALSE;
for (i = 0; !found_picture && i < priv->dpb_count; i++) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (!fs->output_needed)
continue;
for (j = 0; !found_picture && j < fs->num_buffers; j++)
found_picture = fs->buffers[j]->output_needed &&
fs->buffers[j]->base.poc < picture->base.poc;
}
if (!found_picture)
return dpb_output(decoder, NULL, picture);
if (!dpb_bump(decoder))
return FALSE;
}
gst_vaapi_frame_store_replace(&priv->dpb[priv->dpb_count++], fs);
picture->output_needed = TRUE;
fs->output_needed++;
}
return TRUE;
}
static inline void
dpb_reset(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
priv->dpb_size = get_max_dec_frame_buffering(sps);
GST_DEBUG("DPB size %u", priv->dpb_size);
}
static GstVaapiDecoderStatus
get_status(GstH264ParserResult result)
{
GstVaapiDecoderStatus status;
switch (result) {
case GST_H264_PARSER_OK:
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
break;
case GST_H264_PARSER_NO_NAL_END:
status = GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
break;
case GST_H264_PARSER_ERROR:
status = GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
break;
default:
status = GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
break;
}
return status;
}
static void
gst_vaapi_decoder_h264_close(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gst_vaapi_picture_replace(&priv->current_picture, NULL);
dpb_clear(decoder);
if (priv->parser) {
gst_h264_nal_parser_free(priv->parser);
priv->parser = NULL;
}
if (priv->adapter) {
gst_adapter_clear(priv->adapter);
g_object_unref(priv->adapter);
priv->adapter = NULL;
}
}
static gboolean
gst_vaapi_decoder_h264_open(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gst_vaapi_decoder_h264_close(decoder);
priv->adapter = gst_adapter_new();
if (!priv->adapter)
return FALSE;
priv->parser = gst_h264_nal_parser_new();
if (!priv->parser)
return FALSE;
return TRUE;
}
static void
gst_vaapi_decoder_h264_destroy(GstVaapiDecoderH264 *decoder)
{
gst_vaapi_decoder_h264_close(decoder);
}
static gboolean
gst_vaapi_decoder_h264_create(GstVaapiDecoderH264 *decoder)
{
if (!GST_VAAPI_DECODER_CODEC(decoder))
return FALSE;
return TRUE;
}
static guint
h264_get_profile(GstH264SPS *sps)
{
guint profile = 0;
switch (sps->profile_idc) {
case 66:
profile = GST_VAAPI_PROFILE_H264_BASELINE;
break;
case 77:
profile = GST_VAAPI_PROFILE_H264_MAIN;
break;
case 100:
profile = GST_VAAPI_PROFILE_H264_HIGH;
break;
}
return profile;
}
static guint
h264_get_chroma_type(GstH264SPS *sps)
{
guint chroma_type = 0;
switch (sps->chroma_format_idc) {
case 1:
chroma_type = GST_VAAPI_CHROMA_TYPE_YUV420;
break;
case 2:
chroma_type = GST_VAAPI_CHROMA_TYPE_YUV422;
break;
case 3:
if (!sps->separate_colour_plane_flag)
chroma_type = GST_VAAPI_CHROMA_TYPE_YUV444;
break;
}
return chroma_type;
}
static GstVaapiProfile
get_profile(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDisplay * const display = GST_VAAPI_DECODER_DISPLAY(decoder);
GstVaapiProfile profile, profiles[2];
guint i, n_profiles = 0;
profile = h264_get_profile(sps);
if (!profile)
return GST_VAAPI_PROFILE_UNKNOWN;
profiles[n_profiles++] = profile;
switch (profile) {
case GST_VAAPI_PROFILE_H264_MAIN:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_HIGH;
break;
default:
break;
}
/* If the preferred profile (profiles[0]) matches one that we already
found, then just return it now instead of searching for it again */
if (profiles[0] == priv->profile)
return priv->profile;
for (i = 0; i < n_profiles; i++) {
if (gst_vaapi_display_has_decoder(display, profiles[i], priv->entrypoint))
return profiles[i];
}
return GST_VAAPI_PROFILE_UNKNOWN;
}
static GstVaapiDecoderStatus
ensure_context(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
{
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER_CAST(decoder);
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiContextInfo info;
GstVaapiProfile profile;
GstVaapiChromaType chroma_type;
gboolean reset_context = FALSE;
guint mb_width, mb_height;
profile = get_profile(decoder, sps);
if (!profile) {
GST_ERROR("unsupported profile_idc %u", sps->profile_idc);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
}
if (priv->profile != profile) {
GST_DEBUG("profile changed");
reset_context = TRUE;
priv->profile = profile;
}
chroma_type = h264_get_chroma_type(sps);
if (!chroma_type || chroma_type != GST_VAAPI_CHROMA_TYPE_YUV420) {
GST_ERROR("unsupported chroma_format_idc %u", sps->chroma_format_idc);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT;
}
if (priv->chroma_type != chroma_type) {
GST_DEBUG("chroma format changed");
reset_context = TRUE;
priv->chroma_type = chroma_type;
}
mb_width = sps->pic_width_in_mbs_minus1 + 1;
mb_height = (sps->pic_height_in_map_units_minus1 + 1) <<
!sps->frame_mbs_only_flag;
if (priv->mb_width != mb_width || priv->mb_height != mb_height) {
GST_DEBUG("size changed");
reset_context = TRUE;
priv->mb_width = mb_width;
priv->mb_height = mb_height;
}
priv->progressive_sequence = sps->frame_mbs_only_flag;
#if 0
/* XXX: we only output complete frames for now */
gst_vaapi_decoder_set_interlaced(base_decoder, !priv->progressive_sequence);
#endif
gst_vaapi_decoder_set_pixel_aspect_ratio(
base_decoder,
sps->vui_parameters.par_n,
sps->vui_parameters.par_d
);
if (!reset_context && priv->has_context)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
/* XXX: fix surface size when cropping is implemented */
info.profile = priv->profile;
info.entrypoint = priv->entrypoint;
info.width = sps->width;
info.height = sps->height;
info.ref_frames = get_max_dec_frame_buffering(sps);
if (!gst_vaapi_decoder_ensure_context(GST_VAAPI_DECODER(decoder), &info))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
priv->has_context = TRUE;
/* Reset DPB */
dpb_reset(decoder, sps);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static void
fill_iq_matrix_4x4(VAIQMatrixBufferH264 *iq_matrix, const GstH264PPS *pps)
{
const guint8 (* const ScalingList4x4)[6][16] = &pps->scaling_lists_4x4;
guint i, j;
/* There are always 6 4x4 scaling lists */
g_assert(G_N_ELEMENTS(iq_matrix->ScalingList4x4) == 6);
g_assert(G_N_ELEMENTS(iq_matrix->ScalingList4x4[0]) == 16);
if (sizeof(iq_matrix->ScalingList4x4[0][0]) == 1)
memcpy(iq_matrix->ScalingList4x4, *ScalingList4x4,
sizeof(iq_matrix->ScalingList4x4));
else {
for (i = 0; i < G_N_ELEMENTS(iq_matrix->ScalingList4x4); i++) {
for (j = 0; j < G_N_ELEMENTS(iq_matrix->ScalingList4x4[i]); j++)
iq_matrix->ScalingList4x4[i][j] = (*ScalingList4x4)[i][j];
}
}
}
static void
fill_iq_matrix_8x8(VAIQMatrixBufferH264 *iq_matrix, const GstH264PPS *pps)
{
const guint8 (* const ScalingList8x8)[6][64] = &pps->scaling_lists_8x8;
const GstH264SPS * const sps = pps->sequence;
guint i, j, n;
/* If chroma_format_idc != 3, there are up to 2 8x8 scaling lists */
if (!pps->transform_8x8_mode_flag)
return;
g_assert(G_N_ELEMENTS(iq_matrix->ScalingList8x8) >= 2);
g_assert(G_N_ELEMENTS(iq_matrix->ScalingList8x8[0]) == 64);
if (sizeof(iq_matrix->ScalingList8x8[0][0]) == 1)
memcpy(iq_matrix->ScalingList8x8, *ScalingList8x8,
sizeof(iq_matrix->ScalingList8x8));
else {
n = (sps->chroma_format_idc != 3) ? 2 : 6;
for (i = 0; i < n; i++) {
for (j = 0; j < G_N_ELEMENTS(iq_matrix->ScalingList8x8[i]); j++)
iq_matrix->ScalingList8x8[i][j] = (*ScalingList8x8)[i][j];
}
}
}
static GstVaapiDecoderStatus
ensure_quant_matrix(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiPicture * const base_picture = &picture->base;
GstH264PPS * const pps = picture->pps;
GstH264SPS * const sps = pps->sequence;
VAIQMatrixBufferH264 *iq_matrix;
base_picture->iq_matrix = GST_VAAPI_IQ_MATRIX_NEW(H264, decoder);
if (!base_picture->iq_matrix) {
GST_ERROR("failed to allocate IQ matrix");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
iq_matrix = base_picture->iq_matrix->param;
/* XXX: we can only support 4:2:0 or 4:2:2 since ScalingLists8x8[]
is not large enough to hold lists for 4:4:4 */
if (sps->chroma_format_idc == 3)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT;
fill_iq_matrix_4x4(iq_matrix, pps);
fill_iq_matrix_8x8(iq_matrix, pps);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_current_picture(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 * const picture = priv->current_picture;
GstVaapiDecoderStatus status;
if (!picture)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
status = ensure_context(decoder, picture->pps->sequence);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
if (!exec_ref_pic_marking(decoder, picture))
goto error;
if (!dpb_add(decoder, picture))
goto error;
if (!gst_vaapi_picture_decode(GST_VAAPI_PICTURE_CAST(picture)))
goto error;
if (priv->prev_frame && gst_vaapi_frame_store_has_frame(priv->prev_frame))
gst_vaapi_picture_replace(&priv->current_picture, NULL);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
error:
/* XXX: fix for cases where first field failed to be decoded */
gst_vaapi_picture_replace(&priv->current_picture, NULL);
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
static GstVaapiDecoderStatus
decode_sps(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264SPS * const sps = &priv->last_sps;
GstH264ParserResult result;
GST_DEBUG("decode SPS");
memset(sps, 0, sizeof(*sps));
result = gst_h264_parser_parse_sps(priv->parser, nalu, sps, TRUE);
if (result != GST_H264_PARSER_OK)
return get_status(result);
priv->got_sps = TRUE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_pps(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = &priv->last_pps;
GstH264ParserResult result;
GST_DEBUG("decode PPS");
memset(pps, 0, sizeof(*pps));
result = gst_h264_parser_parse_pps(priv->parser, nalu, pps);
if (result != GST_H264_PARSER_OK)
return get_status(result);
priv->got_pps = TRUE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_sei(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264SEIMessage sei;
GstH264ParserResult result;
GST_DEBUG("decode SEI");
memset(&sei, 0, sizeof(sei));
result = gst_h264_parser_parse_sei(priv->parser, nalu, &sei);
if (result != GST_H264_PARSER_OK) {
GST_WARNING("failed to decode SEI, payload type:%d", sei.payloadType);
return get_status(result);
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_sequence_end(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderStatus status;
GST_DEBUG("decode sequence-end");
status = decode_current_picture(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
dpb_flush(decoder);
return GST_VAAPI_DECODER_STATUS_END_OF_STREAM;
}
/* 8.2.1.1 - Decoding process for picture order count type 0 */
static void
init_picture_poc_0(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
const gint32 MaxPicOrderCntLsb = 1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
gint32 temp_poc;
GST_DEBUG("decode picture order count type 0");
if (GST_VAAPI_PICTURE_IS_IDR(picture)) {
priv->prev_poc_msb = 0;
priv->prev_poc_lsb = 0;
}
else if (priv->prev_pic_has_mmco5) {
priv->prev_poc_msb = 0;
priv->prev_poc_lsb =
(priv->prev_pic_structure == GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD ?
0 : priv->field_poc[TOP_FIELD]);
}
else {
priv->prev_poc_msb = priv->poc_msb;
priv->prev_poc_lsb = priv->poc_lsb;
}
// (8-3)
priv->poc_lsb = slice_hdr->pic_order_cnt_lsb;
if (priv->poc_lsb < priv->prev_poc_lsb &&
(priv->prev_poc_lsb - priv->poc_lsb) >= (MaxPicOrderCntLsb / 2))
priv->poc_msb = priv->prev_poc_msb + MaxPicOrderCntLsb;
else if (priv->poc_lsb > priv->prev_poc_lsb &&
(priv->poc_lsb - priv->prev_poc_lsb) > (MaxPicOrderCntLsb / 2))
priv->poc_msb = priv->prev_poc_msb - MaxPicOrderCntLsb;
else
priv->poc_msb = priv->prev_poc_msb;
temp_poc = priv->poc_msb + priv->poc_lsb;
switch (picture->structure) {
case GST_VAAPI_PICTURE_STRUCTURE_FRAME:
// (8-4, 8-5)
priv->field_poc[TOP_FIELD] = temp_poc;
priv->field_poc[BOTTOM_FIELD] = temp_poc +
slice_hdr->delta_pic_order_cnt_bottom;
break;
case GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD:
// (8-4)
priv->field_poc[TOP_FIELD] = temp_poc;
break;
case GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD:
// (8-5)
priv->field_poc[BOTTOM_FIELD] = temp_poc;
break;
}
}
/* 8.2.1.2 - Decoding process for picture order count type 1 */
static void
init_picture_poc_1(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
const gint32 MaxFrameNum = 1 << (sps->log2_max_frame_num_minus4 + 4);
gint32 prev_frame_num_offset, abs_frame_num, expected_poc;
guint i;
GST_DEBUG("decode picture order count type 1");
if (priv->prev_pic_has_mmco5)
prev_frame_num_offset = 0;
else
prev_frame_num_offset = priv->frame_num_offset;
// (8-6)
if (GST_VAAPI_PICTURE_IS_IDR(picture))
priv->frame_num_offset = 0;
else if (priv->prev_frame_num > priv->frame_num)
priv->frame_num_offset = prev_frame_num_offset + MaxFrameNum;
else
priv->frame_num_offset = prev_frame_num_offset;
// (8-7)
if (sps->num_ref_frames_in_pic_order_cnt_cycle != 0)
abs_frame_num = priv->frame_num_offset + priv->frame_num;
else
abs_frame_num = 0;
if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture) && abs_frame_num > 0)
abs_frame_num = abs_frame_num - 1;
if (abs_frame_num > 0) {
gint32 expected_delta_per_poc_cycle;
gint32 poc_cycle_cnt, frame_num_in_poc_cycle;
expected_delta_per_poc_cycle = 0;
for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
// (8-8)
poc_cycle_cnt = (abs_frame_num - 1) /
sps->num_ref_frames_in_pic_order_cnt_cycle;
frame_num_in_poc_cycle = (abs_frame_num - 1) %
sps->num_ref_frames_in_pic_order_cnt_cycle;
// (8-9)
expected_poc = poc_cycle_cnt * expected_delta_per_poc_cycle;
for (i = 0; i <= frame_num_in_poc_cycle; i++)
expected_poc += sps->offset_for_ref_frame[i];
}
else
expected_poc = 0;
if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
expected_poc += sps->offset_for_non_ref_pic;
// (8-10)
switch (picture->structure) {
case GST_VAAPI_PICTURE_STRUCTURE_FRAME:
priv->field_poc[TOP_FIELD] = expected_poc +
slice_hdr->delta_pic_order_cnt[0];
priv->field_poc[BOTTOM_FIELD] = priv->field_poc[TOP_FIELD] +
sps->offset_for_top_to_bottom_field +
slice_hdr->delta_pic_order_cnt[1];
break;
case GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD:
priv->field_poc[TOP_FIELD] = expected_poc +
slice_hdr->delta_pic_order_cnt[0];
break;
case GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD:
priv->field_poc[BOTTOM_FIELD] = expected_poc +
sps->offset_for_top_to_bottom_field +
slice_hdr->delta_pic_order_cnt[0];
break;
}
}
/* 8.2.1.3 - Decoding process for picture order count type 2 */
static void
init_picture_poc_2(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
const gint32 MaxFrameNum = 1 << (sps->log2_max_frame_num_minus4 + 4);
gint32 prev_frame_num_offset, temp_poc;
GST_DEBUG("decode picture order count type 2");
if (priv->prev_pic_has_mmco5)
prev_frame_num_offset = 0;
else
prev_frame_num_offset = priv->frame_num_offset;
// (8-11)
if (GST_VAAPI_PICTURE_IS_IDR(picture))
priv->frame_num_offset = 0;
else if (priv->prev_frame_num > priv->frame_num)
priv->frame_num_offset = prev_frame_num_offset + MaxFrameNum;
else
priv->frame_num_offset = prev_frame_num_offset;
// (8-12)
if (GST_VAAPI_PICTURE_IS_IDR(picture))
temp_poc = 0;
else if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
temp_poc = 2 * (priv->frame_num_offset + priv->frame_num) - 1;
else
temp_poc = 2 * (priv->frame_num_offset + priv->frame_num);
// (8-13)
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD)
priv->field_poc[TOP_FIELD] = temp_poc;
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD)
priv->field_poc[BOTTOM_FIELD] = temp_poc;
}
/* 8.2.1 - Decoding process for picture order count */
static void
init_picture_poc(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
switch (sps->pic_order_cnt_type) {
case 0:
init_picture_poc_0(decoder, picture, slice_hdr);
break;
case 1:
init_picture_poc_1(decoder, picture, slice_hdr);
break;
case 2:
init_picture_poc_2(decoder, picture, slice_hdr);
break;
}
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD)
picture->field_poc[TOP_FIELD] = priv->field_poc[TOP_FIELD];
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD)
picture->field_poc[BOTTOM_FIELD] = priv->field_poc[BOTTOM_FIELD];
picture->base.poc = MIN(picture->field_poc[0], picture->field_poc[1]);
}
static int
compare_picture_pic_num_dec(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picB->pic_num - picA->pic_num;
}
static int
compare_picture_long_term_pic_num_inc(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picA->long_term_pic_num - picB->long_term_pic_num;
}
static int
compare_picture_poc_dec(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picB->base.poc - picA->base.poc;
}
static int
compare_picture_poc_inc(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picA->base.poc - picB->base.poc;
}
static int
compare_picture_frame_num_wrap_dec(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picB->frame_num_wrap - picA->frame_num_wrap;
}
static int
compare_picture_long_term_frame_idx_inc(const void *a, const void *b)
{
const GstVaapiPictureH264 * const picA = *(GstVaapiPictureH264 **)a;
const GstVaapiPictureH264 * const picB = *(GstVaapiPictureH264 **)b;
return picA->long_term_frame_idx - picB->long_term_frame_idx;
}
/* 8.2.4.1 - Decoding process for picture numbers */
static void
init_picture_refs_pic_num(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
const gint32 MaxFrameNum = 1 << (sps->log2_max_frame_num_minus4 + 4);
guint i;
GST_DEBUG("decode picture numbers");
for (i = 0; i < priv->short_ref_count; i++) {
GstVaapiPictureH264 * const pic = priv->short_ref[i];
// (8-27)
if (pic->frame_num > priv->frame_num)
pic->frame_num_wrap = pic->frame_num - MaxFrameNum;
else
pic->frame_num_wrap = pic->frame_num;
// (8-28, 8-30, 8-31)
if (GST_VAAPI_PICTURE_IS_FRAME(picture))
pic->pic_num = pic->frame_num_wrap;
else {
if (pic->structure == picture->structure)
pic->pic_num = 2 * pic->frame_num_wrap + 1;
else
pic->pic_num = 2 * pic->frame_num_wrap;
}
}
for (i = 0; i < priv->long_ref_count; i++) {
GstVaapiPictureH264 * const pic = priv->long_ref[i];
// (8-29, 8-32, 8-33)
if (GST_VAAPI_PICTURE_IS_FRAME(picture))
pic->long_term_pic_num = pic->long_term_frame_idx;
else {
if (pic->structure == picture->structure)
pic->long_term_pic_num = 2 * pic->long_term_frame_idx + 1;
else
pic->long_term_pic_num = 2 * pic->long_term_frame_idx;
}
}
}
#define SORT_REF_LIST(list, n, compare_func) \
qsort(list, n, sizeof(*(list)), compare_picture_##compare_func)
static void
init_picture_refs_fields_1(
guint picture_structure,
GstVaapiPictureH264 *RefPicList[32],
guint *RefPicList_count,
GstVaapiPictureH264 *ref_list[32],
guint ref_list_count
)
{
guint i, j, n;
i = 0;
j = 0;
n = *RefPicList_count;
do {
g_assert(n < 32);
for (; i < ref_list_count; i++) {
if (ref_list[i]->structure == picture_structure) {
RefPicList[n++] = ref_list[i++];
break;
}
}
for (; j < ref_list_count; j++) {
if (ref_list[j]->structure != picture_structure) {
RefPicList[n++] = ref_list[j++];
break;
}
}
} while (i < ref_list_count || j < ref_list_count);
*RefPicList_count = n;
}
static inline void
init_picture_refs_fields(
GstVaapiPictureH264 *picture,
GstVaapiPictureH264 *RefPicList[32],
guint *RefPicList_count,
GstVaapiPictureH264 *short_ref[32],
guint short_ref_count,
GstVaapiPictureH264 *long_ref[32],
guint long_ref_count
)
{
guint n = 0;
/* 8.2.4.2.5 - reference picture lists in fields */
init_picture_refs_fields_1(picture->structure, RefPicList, &n,
short_ref, short_ref_count);
init_picture_refs_fields_1(picture->structure, RefPicList, &n,
long_ref, long_ref_count);
*RefPicList_count = n;
}
static void
init_picture_refs_p_slice(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 **ref_list;
guint i;
GST_DEBUG("decode reference picture list for P and SP slices");
if (GST_VAAPI_PICTURE_IS_FRAME(picture)) {
/* 8.2.4.2.1 - P and SP slices in frames */
if (priv->short_ref_count > 0) {
ref_list = priv->RefPicList0;
for (i = 0; i < priv->short_ref_count; i++)
ref_list[i] = priv->short_ref[i];
SORT_REF_LIST(ref_list, i, pic_num_dec);
priv->RefPicList0_count += i;
}
if (priv->long_ref_count > 0) {
ref_list = &priv->RefPicList0[priv->RefPicList0_count];
for (i = 0; i < priv->long_ref_count; i++)
ref_list[i] = priv->long_ref[i];
SORT_REF_LIST(ref_list, i, long_term_pic_num_inc);
priv->RefPicList0_count += i;
}
}
else {
/* 8.2.4.2.2 - P and SP slices in fields */
GstVaapiPictureH264 *short_ref[32];
guint short_ref_count = 0;
GstVaapiPictureH264 *long_ref[32];
guint long_ref_count = 0;
if (priv->short_ref_count > 0) {
for (i = 0; i < priv->short_ref_count; i++)
short_ref[i] = priv->short_ref[i];
SORT_REF_LIST(short_ref, i, frame_num_wrap_dec);
short_ref_count = i;
}
if (priv->long_ref_count > 0) {
for (i = 0; i < priv->long_ref_count; i++)
long_ref[i] = priv->long_ref[i];
SORT_REF_LIST(long_ref, i, long_term_frame_idx_inc);
long_ref_count = i;
}
init_picture_refs_fields(
picture,
priv->RefPicList0, &priv->RefPicList0_count,
short_ref, short_ref_count,
long_ref, long_ref_count
);
}
}
static void
init_picture_refs_b_slice(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 **ref_list;
guint i, n;
GST_DEBUG("decode reference picture list for B slices");
if (GST_VAAPI_PICTURE_IS_FRAME(picture)) {
/* 8.2.4.2.3 - B slices in frames */
/* RefPicList0 */
if (priv->short_ref_count > 0) {
// 1. Short-term references
ref_list = priv->RefPicList0;
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc < picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_dec);
priv->RefPicList0_count += n;
ref_list = &priv->RefPicList0[priv->RefPicList0_count];
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc >= picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_inc);
priv->RefPicList0_count += n;
}
if (priv->long_ref_count > 0) {
// 2. Long-term references
ref_list = &priv->RefPicList0[priv->RefPicList0_count];
for (n = 0, i = 0; i < priv->long_ref_count; i++)
ref_list[n++] = priv->long_ref[i];
SORT_REF_LIST(ref_list, n, long_term_pic_num_inc);
priv->RefPicList0_count += n;
}
/* RefPicList1 */
if (priv->short_ref_count > 0) {
// 1. Short-term references
ref_list = priv->RefPicList1;
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc > picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_inc);
priv->RefPicList1_count += n;
ref_list = &priv->RefPicList1[priv->RefPicList1_count];
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc <= picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_dec);
priv->RefPicList1_count += n;
}
if (priv->long_ref_count > 0) {
// 2. Long-term references
ref_list = &priv->RefPicList1[priv->RefPicList1_count];
for (n = 0, i = 0; i < priv->long_ref_count; i++)
ref_list[n++] = priv->long_ref[i];
SORT_REF_LIST(ref_list, n, long_term_pic_num_inc);
priv->RefPicList1_count += n;
}
}
else {
/* 8.2.4.2.4 - B slices in fields */
GstVaapiPictureH264 *short_ref0[32];
guint short_ref0_count = 0;
GstVaapiPictureH264 *short_ref1[32];
guint short_ref1_count = 0;
GstVaapiPictureH264 *long_ref[32];
guint long_ref_count = 0;
/* refFrameList0ShortTerm */
if (priv->short_ref_count > 0) {
ref_list = short_ref0;
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc <= picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_dec);
short_ref0_count += n;
ref_list = &short_ref0[short_ref0_count];
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc > picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_inc);
short_ref0_count += n;
}
/* refFrameList1ShortTerm */
if (priv->short_ref_count > 0) {
ref_list = short_ref1;
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc > picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_inc);
short_ref1_count += n;
ref_list = &short_ref1[short_ref1_count];
for (n = 0, i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->base.poc <= picture->base.poc)
ref_list[n++] = priv->short_ref[i];
}
SORT_REF_LIST(ref_list, n, poc_dec);
short_ref1_count += n;
}
/* refFrameListLongTerm */
if (priv->long_ref_count > 0) {
for (i = 0; i < priv->long_ref_count; i++)
long_ref[i] = priv->long_ref[i];
SORT_REF_LIST(long_ref, i, long_term_frame_idx_inc);
long_ref_count = i;
}
init_picture_refs_fields(
picture,
priv->RefPicList0, &priv->RefPicList0_count,
short_ref0, short_ref0_count,
long_ref, long_ref_count
);
init_picture_refs_fields(
picture,
priv->RefPicList1, &priv->RefPicList1_count,
short_ref1, short_ref1_count,
long_ref, long_ref_count
);
}
/* Check whether RefPicList1 is identical to RefPicList0, then
swap if necessary */
if (priv->RefPicList1_count > 1 &&
priv->RefPicList1_count == priv->RefPicList0_count &&
memcmp(priv->RefPicList0, priv->RefPicList1,
priv->RefPicList0_count * sizeof(priv->RefPicList0[0])) == 0) {
GstVaapiPictureH264 * const tmp = priv->RefPicList1[0];
priv->RefPicList1[0] = priv->RefPicList1[1];
priv->RefPicList1[1] = tmp;
}
}
#undef SORT_REF_LIST
static gint
find_short_term_reference(GstVaapiDecoderH264 *decoder, gint32 pic_num)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i;
for (i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->pic_num == pic_num)
return i;
}
GST_ERROR("found no short-term reference picture with PicNum = %d",
pic_num);
return -1;
}
static gint
find_long_term_reference(GstVaapiDecoderH264 *decoder, gint32 long_term_pic_num)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i;
for (i = 0; i < priv->long_ref_count; i++) {
if (priv->long_ref[i]->long_term_pic_num == long_term_pic_num)
return i;
}
GST_ERROR("found no long-term reference picture with LongTermPicNum = %d",
long_term_pic_num);
return -1;
}
static void
exec_picture_refs_modification_1(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr,
guint list
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
GstH264RefPicListModification *ref_pic_list_modification;
guint num_ref_pic_list_modifications;
GstVaapiPictureH264 **ref_list;
guint *ref_list_count_ptr, ref_list_count, ref_list_idx = 0;
guint i, j, n, num_refs;
gint found_ref_idx;
gint32 MaxPicNum, CurrPicNum, picNumPred;
GST_DEBUG("modification process of reference picture list %u", list);
if (list == 0) {
ref_pic_list_modification = slice_hdr->ref_pic_list_modification_l0;
num_ref_pic_list_modifications = slice_hdr->n_ref_pic_list_modification_l0;
ref_list = priv->RefPicList0;
ref_list_count_ptr = &priv->RefPicList0_count;
num_refs = slice_hdr->num_ref_idx_l0_active_minus1 + 1;
}
else {
ref_pic_list_modification = slice_hdr->ref_pic_list_modification_l1;
num_ref_pic_list_modifications = slice_hdr->n_ref_pic_list_modification_l1;
ref_list = priv->RefPicList1;
ref_list_count_ptr = &priv->RefPicList1_count;
num_refs = slice_hdr->num_ref_idx_l1_active_minus1 + 1;
}
ref_list_count = *ref_list_count_ptr;
if (!GST_VAAPI_PICTURE_IS_FRAME(picture)) {
MaxPicNum = 1 << (sps->log2_max_frame_num_minus4 + 5); // 2 * MaxFrameNum
CurrPicNum = 2 * slice_hdr->frame_num + 1; // 2 * frame_num + 1
}
else {
MaxPicNum = 1 << (sps->log2_max_frame_num_minus4 + 4); // MaxFrameNum
CurrPicNum = slice_hdr->frame_num; // frame_num
}
picNumPred = CurrPicNum;
for (i = 0; i < num_ref_pic_list_modifications; i++) {
GstH264RefPicListModification * const l = &ref_pic_list_modification[i];
if (l->modification_of_pic_nums_idc == 3)
break;
/* 8.2.4.3.1 - Short-term reference pictures */
if (l->modification_of_pic_nums_idc == 0 || l->modification_of_pic_nums_idc == 1) {
gint32 abs_diff_pic_num = l->value.abs_diff_pic_num_minus1 + 1;
gint32 picNum, picNumNoWrap;
// (8-34)
if (l->modification_of_pic_nums_idc == 0) {
picNumNoWrap = picNumPred - abs_diff_pic_num;
if (picNumNoWrap < 0)
picNumNoWrap += MaxPicNum;
}
// (8-35)
else {
picNumNoWrap = picNumPred + abs_diff_pic_num;
if (picNumNoWrap >= MaxPicNum)
picNumNoWrap -= MaxPicNum;
}
picNumPred = picNumNoWrap;
// (8-36)
picNum = picNumNoWrap;
if (picNum > CurrPicNum)
picNum -= MaxPicNum;
// (8-37)
for (j = num_refs; j > ref_list_idx; j--)
ref_list[j] = ref_list[j - 1];
found_ref_idx = find_short_term_reference(decoder, picNum);
ref_list[ref_list_idx++] =
found_ref_idx >= 0 ? priv->short_ref[found_ref_idx] : NULL;
n = ref_list_idx;
for (j = ref_list_idx; j <= num_refs; j++) {
gint32 PicNumF;
if (!ref_list[j])
continue;
PicNumF =
GST_VAAPI_PICTURE_IS_SHORT_TERM_REFERENCE(ref_list[j]) ?
ref_list[j]->pic_num : MaxPicNum;
if (PicNumF != picNum)
ref_list[n++] = ref_list[j];
}
}
/* 8.2.4.3.2 - Long-term reference pictures */
else {
for (j = num_refs; j > ref_list_idx; j--)
ref_list[j] = ref_list[j - 1];
found_ref_idx =
find_long_term_reference(decoder, l->value.long_term_pic_num);
ref_list[ref_list_idx++] =
found_ref_idx >= 0 ? priv->long_ref[found_ref_idx] : NULL;
n = ref_list_idx;
for (j = ref_list_idx; j <= num_refs; j++) {
gint32 LongTermPicNumF;
if (!ref_list[j])
continue;
LongTermPicNumF =
GST_VAAPI_PICTURE_IS_LONG_TERM_REFERENCE(ref_list[j]) ?
ref_list[j]->long_term_pic_num : INT_MAX;
if (LongTermPicNumF != l->value.long_term_pic_num)
ref_list[n++] = ref_list[j];
}
}
}
#if DEBUG
for (i = 0; i < num_refs; i++)
if (!ref_list[i])
GST_ERROR("list %u entry %u is empty", list, i);
#endif
*ref_list_count_ptr = num_refs;
}
/* 8.2.4.3 - Modification process for reference picture lists */
static void
exec_picture_refs_modification(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GST_DEBUG("execute ref_pic_list_modification()");
/* RefPicList0 */
if (!GST_H264_IS_I_SLICE(slice_hdr) && !GST_H264_IS_SI_SLICE(slice_hdr) &&
slice_hdr->ref_pic_list_modification_flag_l0)
exec_picture_refs_modification_1(decoder, picture, slice_hdr, 0);
/* RefPicList1 */
if (GST_H264_IS_B_SLICE(slice_hdr) &&
slice_hdr->ref_pic_list_modification_flag_l1)
exec_picture_refs_modification_1(decoder, picture, slice_hdr, 1);
}
static void
init_picture_ref_lists(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i, j, short_ref_count, long_ref_count;
short_ref_count = 0;
long_ref_count = 0;
if (GST_VAAPI_PICTURE_IS_FRAME(priv->current_picture)) {
for (i = 0; i < priv->dpb_count; i++) {
GstVaapiFrameStore * const fs = priv->dpb[i];
GstVaapiPictureH264 *picture;
if (!gst_vaapi_frame_store_has_frame(fs))
continue;
picture = fs->buffers[0];
if (GST_VAAPI_PICTURE_IS_SHORT_TERM_REFERENCE(picture))
priv->short_ref[short_ref_count++] = picture;
else if (GST_VAAPI_PICTURE_IS_LONG_TERM_REFERENCE(picture))
priv->long_ref[long_ref_count++] = picture;
picture->structure = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
picture->other_field = fs->buffers[1];
}
}
else {
for (i = 0; i < priv->dpb_count; i++) {
GstVaapiFrameStore * const fs = priv->dpb[i];
for (j = 0; j < fs->num_buffers; j++) {
GstVaapiPictureH264 * const picture = fs->buffers[j];
if (GST_VAAPI_PICTURE_IS_SHORT_TERM_REFERENCE(picture))
priv->short_ref[short_ref_count++] = picture;
else if (GST_VAAPI_PICTURE_IS_LONG_TERM_REFERENCE(picture))
priv->long_ref[long_ref_count++] = picture;
picture->structure = picture->base.structure;
picture->other_field = fs->buffers[j ^ 1];
}
}
}
for (i = short_ref_count; i < priv->short_ref_count; i++)
priv->short_ref[i] = NULL;
priv->short_ref_count = short_ref_count;
for (i = long_ref_count; i < priv->long_ref_count; i++)
priv->long_ref[i] = NULL;
priv->long_ref_count = long_ref_count;
}
static void
init_picture_refs(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPicture * const base_picture = &picture->base;
guint i, num_refs;
init_picture_ref_lists(decoder);
init_picture_refs_pic_num(decoder, picture, slice_hdr);
priv->RefPicList0_count = 0;
priv->RefPicList1_count = 0;
switch (base_picture->type) {
case GST_VAAPI_PICTURE_TYPE_P:
case GST_VAAPI_PICTURE_TYPE_SP:
init_picture_refs_p_slice(decoder, picture, slice_hdr);
break;
case GST_VAAPI_PICTURE_TYPE_B:
init_picture_refs_b_slice(decoder, picture, slice_hdr);
break;
default:
break;
}
exec_picture_refs_modification(decoder, picture, slice_hdr);
switch (base_picture->type) {
case GST_VAAPI_PICTURE_TYPE_B:
num_refs = 1 + slice_hdr->num_ref_idx_l1_active_minus1;
for (i = priv->RefPicList1_count; i < num_refs; i++)
priv->RefPicList1[i] = NULL;
priv->RefPicList1_count = num_refs;
// fall-through
case GST_VAAPI_PICTURE_TYPE_P:
case GST_VAAPI_PICTURE_TYPE_SP:
num_refs = 1 + slice_hdr->num_ref_idx_l0_active_minus1;
for (i = priv->RefPicList0_count; i < num_refs; i++)
priv->RefPicList0[i] = NULL;
priv->RefPicList0_count = num_refs;
break;
default:
break;
}
}
static gboolean
init_picture(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr,
GstH264NalUnit *nalu
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPicture * const base_picture = &picture->base;
priv->prev_frame_num = priv->frame_num;
priv->frame_num = slice_hdr->frame_num;
picture->frame_num = priv->frame_num;
picture->frame_num_wrap = priv->frame_num;
picture->output_flag = TRUE; /* XXX: conformant to Annex A only */
base_picture->pts = gst_adapter_prev_timestamp(priv->adapter, NULL);
/* Reset decoder state for IDR pictures */
if (nalu->type == GST_H264_NAL_SLICE_IDR) {
GST_DEBUG("<IDR>");
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_IDR);
dpb_flush(decoder);
}
/* Initialize slice type */
switch (slice_hdr->type % 5) {
case GST_H264_P_SLICE:
base_picture->type = GST_VAAPI_PICTURE_TYPE_P;
break;
case GST_H264_B_SLICE:
base_picture->type = GST_VAAPI_PICTURE_TYPE_B;
break;
case GST_H264_I_SLICE:
base_picture->type = GST_VAAPI_PICTURE_TYPE_I;
break;
case GST_H264_SP_SLICE:
base_picture->type = GST_VAAPI_PICTURE_TYPE_SP;
break;
case GST_H264_SI_SLICE:
base_picture->type = GST_VAAPI_PICTURE_TYPE_SI;
break;
}
/* Initialize picture structure */
if (!slice_hdr->field_pic_flag)
base_picture->structure = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
else {
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_INTERLACED);
if (!slice_hdr->bottom_field_flag)
base_picture->structure = GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD;
else
base_picture->structure = GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD;
}
picture->structure = base_picture->structure;
/* Initialize reference flags */
if (nalu->ref_idc) {
GstH264DecRefPicMarking * const dec_ref_pic_marking =
&slice_hdr->dec_ref_pic_marking;
if (GST_VAAPI_PICTURE_IS_IDR(picture) &&
dec_ref_pic_marking->long_term_reference_flag)
GST_VAAPI_PICTURE_FLAG_SET(picture,
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE);
else
GST_VAAPI_PICTURE_FLAG_SET(picture,
GST_VAAPI_PICTURE_FLAG_SHORT_TERM_REFERENCE);
}
init_picture_poc(decoder, picture, slice_hdr);
init_picture_refs(decoder, picture, slice_hdr);
return TRUE;
}
/* 8.2.5.3 - Sliding window decoded reference picture marking process */
static gboolean
exec_ref_pic_marking_sliding_window(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = priv->current_picture->pps;
GstH264SPS * const sps = pps->sequence;
GstVaapiPictureH264 *ref_picture;
guint i, m, max_num_ref_frames;
GST_DEBUG("reference picture marking process (sliding window)");
if (!GST_VAAPI_PICTURE_IS_FIRST_FIELD(priv->current_picture))
return TRUE;
max_num_ref_frames = sps->num_ref_frames;
if (max_num_ref_frames == 0)
max_num_ref_frames = 1;
if (!GST_VAAPI_PICTURE_IS_FRAME(priv->current_picture))
max_num_ref_frames <<= 1;
if (priv->short_ref_count + priv->long_ref_count < max_num_ref_frames)
return TRUE;
if (priv->short_ref_count < 1)
return FALSE;
for (m = 0, i = 1; i < priv->short_ref_count; i++) {
GstVaapiPictureH264 * const picture = priv->short_ref[i];
if (picture->frame_num_wrap < priv->short_ref[m]->frame_num_wrap)
m = i;
}
ref_picture = priv->short_ref[m];
gst_vaapi_picture_h264_set_reference(ref_picture, 0, TRUE);
ARRAY_REMOVE_INDEX(priv->short_ref, m);
/* Both fields need to be marked as "unused for reference", so
remove the other field from the short_ref[] list as well */
if (!GST_VAAPI_PICTURE_IS_FRAME(priv->current_picture) && ref_picture->other_field) {
for (i = 0; i < priv->short_ref_count; i++) {
if (priv->short_ref[i] == ref_picture->other_field) {
ARRAY_REMOVE_INDEX(priv->short_ref, i);
break;
}
}
}
return TRUE;
}
static inline gint32
get_picNumX(GstVaapiPictureH264 *picture, GstH264RefPicMarking *ref_pic_marking)
{
gint32 pic_num;
if (GST_VAAPI_PICTURE_IS_FRAME(picture))
pic_num = picture->frame_num_wrap;
else
pic_num = 2 * picture->frame_num_wrap + 1;
pic_num -= ref_pic_marking->difference_of_pic_nums_minus1 + 1;
return pic_num;
}
/* 8.2.5.4.1. Mark short-term reference picture as "unused for reference" */
static void
exec_ref_pic_marking_adaptive_mmco_1(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gint32 i, picNumX;
picNumX = get_picNumX(picture, ref_pic_marking);
i = find_short_term_reference(decoder, picNumX);
if (i < 0)
return;
gst_vaapi_picture_h264_set_reference(priv->short_ref[i], 0,
GST_VAAPI_PICTURE_IS_FRAME(picture));
ARRAY_REMOVE_INDEX(priv->short_ref, i);
}
/* 8.2.5.4.2. Mark long-term reference picture as "unused for reference" */
static void
exec_ref_pic_marking_adaptive_mmco_2(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gint32 i;
i = find_long_term_reference(decoder, ref_pic_marking->long_term_pic_num);
if (i < 0)
return;
gst_vaapi_picture_h264_set_reference(priv->long_ref[i], 0,
GST_VAAPI_PICTURE_IS_FRAME(picture));
ARRAY_REMOVE_INDEX(priv->long_ref, i);
}
/* 8.2.5.4.3. Assign LongTermFrameIdx to a short-term reference picture */
static void
exec_ref_pic_marking_adaptive_mmco_3(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 *ref_picture;
gint32 i, picNumX;
for (i = 0; i < priv->long_ref_count; i++) {
if (priv->long_ref[i]->long_term_frame_idx == ref_pic_marking->long_term_frame_idx)
break;
}
if (i != priv->long_ref_count) {
gst_vaapi_picture_h264_set_reference(priv->long_ref[i], 0, TRUE);
ARRAY_REMOVE_INDEX(priv->long_ref, i);
}
picNumX = get_picNumX(picture, ref_pic_marking);
i = find_short_term_reference(decoder, picNumX);
if (i < 0)
return;
ref_picture = priv->short_ref[i];
ARRAY_REMOVE_INDEX(priv->short_ref, i);
priv->long_ref[priv->long_ref_count++] = ref_picture;
ref_picture->long_term_frame_idx = ref_pic_marking->long_term_frame_idx;
gst_vaapi_picture_h264_set_reference(ref_picture,
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE,
GST_VAAPI_PICTURE_IS_FRAME(picture));
}
/* 8.2.5.4.4. Mark pictures with LongTermFramIdx > max_long_term_frame_idx
* as "unused for reference" */
static void
exec_ref_pic_marking_adaptive_mmco_4(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gint32 i, long_term_frame_idx;
long_term_frame_idx = ref_pic_marking->max_long_term_frame_idx_plus1 - 1;
for (i = 0; i < priv->long_ref_count; i++) {
if (priv->long_ref[i]->long_term_frame_idx <= long_term_frame_idx)
continue;
gst_vaapi_picture_h264_set_reference(priv->long_ref[i], 0, FALSE);
ARRAY_REMOVE_INDEX(priv->long_ref, i);
i--;
}
}
/* 8.2.5.4.5. Mark all reference pictures as "unused for reference" */
static void
exec_ref_pic_marking_adaptive_mmco_5(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
dpb_flush(decoder);
priv->prev_pic_has_mmco5 = TRUE;
/* The picture shall be inferred to have had frame_num equal to 0 (7.4.3) */
priv->frame_num = 0;
priv->frame_num_offset = 0;
picture->frame_num = 0;
/* Update TopFieldOrderCnt and BottomFieldOrderCnt (8.2.1) */
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD)
picture->field_poc[TOP_FIELD] -= picture->base.poc;
if (picture->structure != GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD)
picture->field_poc[BOTTOM_FIELD] -= picture->base.poc;
picture->base.poc = 0;
}
/* 8.2.5.4.6. Assign a long-term frame index to the current picture */
static void
exec_ref_pic_marking_adaptive_mmco_6(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
)
{
picture->long_term_frame_idx = ref_pic_marking->long_term_frame_idx;
gst_vaapi_picture_h264_set_reference(picture,
GST_VAAPI_PICTURE_FLAG_LONG_TERM_REFERENCE, FALSE);
}
/* 8.2.5.4. Adaptive memory control decoded reference picture marking process */
static gboolean
exec_ref_pic_marking_adaptive(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264DecRefPicMarking *dec_ref_pic_marking
)
{
guint i;
GST_DEBUG("reference picture marking process (adaptive memory control)");
typedef void (*exec_ref_pic_marking_adaptive_mmco_func)(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264RefPicMarking *ref_pic_marking
);
static const exec_ref_pic_marking_adaptive_mmco_func mmco_funcs[] = {
NULL,
exec_ref_pic_marking_adaptive_mmco_1,
exec_ref_pic_marking_adaptive_mmco_2,
exec_ref_pic_marking_adaptive_mmco_3,
exec_ref_pic_marking_adaptive_mmco_4,
exec_ref_pic_marking_adaptive_mmco_5,
exec_ref_pic_marking_adaptive_mmco_6,
};
for (i = 0; i < dec_ref_pic_marking->n_ref_pic_marking; i++) {
GstH264RefPicMarking * const ref_pic_marking =
&dec_ref_pic_marking->ref_pic_marking[i];
const guint mmco = ref_pic_marking->memory_management_control_operation;
if (mmco < G_N_ELEMENTS(mmco_funcs) && mmco_funcs[mmco])
mmco_funcs[mmco](decoder, picture, ref_pic_marking);
else {
GST_ERROR("unhandled MMCO %u", mmco);
return FALSE;
}
}
return TRUE;
}
/* 8.2.5 - Execute reference picture marking process */
static gboolean
exec_ref_pic_marking(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
priv->prev_pic_has_mmco5 = FALSE;
priv->prev_pic_structure = picture->structure;
if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
return TRUE;
if (!GST_VAAPI_PICTURE_IS_IDR(picture)) {
GstVaapiSliceH264 * const slice =
gst_vaapi_picture_h264_get_last_slice(picture);
GstH264DecRefPicMarking * const dec_ref_pic_marking =
&slice->slice_hdr.dec_ref_pic_marking;
if (dec_ref_pic_marking->adaptive_ref_pic_marking_mode_flag) {
if (!exec_ref_pic_marking_adaptive(decoder, picture, dec_ref_pic_marking))
return FALSE;
}
else {
if (!exec_ref_pic_marking_sliding_window(decoder))
return FALSE;
}
}
return TRUE;
}
static void
vaapi_init_picture(VAPictureH264 *pic)
{
pic->picture_id = VA_INVALID_ID;
pic->frame_idx = 0;
pic->flags = VA_PICTURE_H264_INVALID;
pic->TopFieldOrderCnt = 0;
pic->BottomFieldOrderCnt = 0;
}
static void
vaapi_fill_picture(VAPictureH264 *pic, GstVaapiPictureH264 *picture,
guint picture_structure)
{
if (!picture_structure)
picture_structure = picture->structure;
pic->picture_id = picture->base.surface_id;
pic->flags = 0;
if (GST_VAAPI_PICTURE_IS_LONG_TERM_REFERENCE(picture)) {
pic->flags |= VA_PICTURE_H264_LONG_TERM_REFERENCE;
pic->frame_idx = picture->long_term_frame_idx;
}
else {
if (GST_VAAPI_PICTURE_IS_SHORT_TERM_REFERENCE(picture))
pic->flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
pic->frame_idx = picture->frame_num;
}
switch (picture_structure) {
case GST_VAAPI_PICTURE_STRUCTURE_FRAME:
pic->TopFieldOrderCnt = picture->field_poc[TOP_FIELD];
pic->BottomFieldOrderCnt = picture->field_poc[BOTTOM_FIELD];
break;
case GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD:
pic->flags |= VA_PICTURE_H264_TOP_FIELD;
pic->TopFieldOrderCnt = picture->field_poc[TOP_FIELD];
pic->BottomFieldOrderCnt = 0;
break;
case GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD:
pic->flags |= VA_PICTURE_H264_BOTTOM_FIELD;
pic->BottomFieldOrderCnt = picture->field_poc[BOTTOM_FIELD];
pic->TopFieldOrderCnt = 0;
break;
}
}
static gboolean
fill_picture(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr,
GstH264NalUnit *nalu
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPicture * const base_picture = &picture->base;
GstH264PPS * const pps = picture->pps;
GstH264SPS * const sps = pps->sequence;
VAPictureParameterBufferH264 * const pic_param = base_picture->param;
guint i, n;
/* Fill in VAPictureParameterBufferH264 */
vaapi_fill_picture(&pic_param->CurrPic, picture, 0);
for (i = 0, n = 0; i < priv->dpb_count; i++) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (gst_vaapi_frame_store_has_reference(fs))
vaapi_fill_picture(&pic_param->ReferenceFrames[n++],
fs->buffers[0], fs->structure);
}
for (; n < G_N_ELEMENTS(pic_param->ReferenceFrames); n++)
vaapi_init_picture(&pic_param->ReferenceFrames[n]);
#define COPY_FIELD(s, f) \
pic_param->f = (s)->f
#define COPY_BFM(a, s, f) \
pic_param->a.bits.f = (s)->f
pic_param->picture_width_in_mbs_minus1 = priv->mb_width - 1;
pic_param->picture_height_in_mbs_minus1 = priv->mb_height - 1;
pic_param->frame_num = priv->frame_num;
COPY_FIELD(sps, bit_depth_luma_minus8);
COPY_FIELD(sps, bit_depth_chroma_minus8);
COPY_FIELD(sps, num_ref_frames);
COPY_FIELD(pps, num_slice_groups_minus1);
COPY_FIELD(pps, slice_group_map_type);
COPY_FIELD(pps, slice_group_change_rate_minus1);
COPY_FIELD(pps, pic_init_qp_minus26);
COPY_FIELD(pps, pic_init_qs_minus26);
COPY_FIELD(pps, chroma_qp_index_offset);
COPY_FIELD(pps, second_chroma_qp_index_offset);
pic_param->seq_fields.value = 0; /* reset all bits */
pic_param->seq_fields.bits.residual_colour_transform_flag = sps->separate_colour_plane_flag;
pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = sps->level_idc >= 31; /* A.3.3.2 */
COPY_BFM(seq_fields, sps, chroma_format_idc);
COPY_BFM(seq_fields, sps, gaps_in_frame_num_value_allowed_flag);
COPY_BFM(seq_fields, sps, frame_mbs_only_flag);
COPY_BFM(seq_fields, sps, mb_adaptive_frame_field_flag);
COPY_BFM(seq_fields, sps, direct_8x8_inference_flag);
COPY_BFM(seq_fields, sps, log2_max_frame_num_minus4);
COPY_BFM(seq_fields, sps, pic_order_cnt_type);
COPY_BFM(seq_fields, sps, log2_max_pic_order_cnt_lsb_minus4);
COPY_BFM(seq_fields, sps, delta_pic_order_always_zero_flag);
pic_param->pic_fields.value = 0; /* reset all bits */
pic_param->pic_fields.bits.field_pic_flag = slice_hdr->field_pic_flag;
pic_param->pic_fields.bits.reference_pic_flag = GST_VAAPI_PICTURE_IS_REFERENCE(picture);
COPY_BFM(pic_fields, pps, entropy_coding_mode_flag);
COPY_BFM(pic_fields, pps, weighted_pred_flag);
COPY_BFM(pic_fields, pps, weighted_bipred_idc);
COPY_BFM(pic_fields, pps, transform_8x8_mode_flag);
COPY_BFM(pic_fields, pps, constrained_intra_pred_flag);
COPY_BFM(pic_fields, pps, pic_order_present_flag);
COPY_BFM(pic_fields, pps, deblocking_filter_control_present_flag);
COPY_BFM(pic_fields, pps, redundant_pic_cnt_present_flag);
return TRUE;
}
/* Detection of the first VCL NAL unit of a primary coded picture (7.4.1.2.4) */
static gboolean
is_new_picture(
GstVaapiDecoderH264 *decoder,
GstH264NalUnit *nalu,
GstH264SliceHdr *slice_hdr
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
GstVaapiSliceH264 *slice;
GstH264SliceHdr *prev_slice_hdr;
if (!priv->current_picture)
return TRUE;
slice = gst_vaapi_picture_h264_get_last_slice(priv->current_picture);
if (!slice)
return FALSE;
prev_slice_hdr = &slice->slice_hdr;
#define CHECK_EXPR(expr, field_name) do { \
if (!(expr)) { \
GST_DEBUG(field_name " differs in value"); \
return TRUE; \
} \
} while (0)
#define CHECK_VALUE(new_slice_hdr, old_slice_hdr, field) \
CHECK_EXPR(((new_slice_hdr)->field == (old_slice_hdr)->field), #field)
/* frame_num differs in value, regardless of inferred values to 0 */
CHECK_VALUE(slice_hdr, prev_slice_hdr, frame_num);
/* pic_parameter_set_id differs in value */
CHECK_VALUE(slice_hdr, prev_slice_hdr, pps);
/* field_pic_flag differs in value */
CHECK_VALUE(slice_hdr, prev_slice_hdr, field_pic_flag);
/* bottom_field_flag is present in both and differs in value */
if (slice_hdr->field_pic_flag && prev_slice_hdr->field_pic_flag)
CHECK_VALUE(slice_hdr, prev_slice_hdr, bottom_field_flag);
/* nal_ref_idc differs in value with one of the nal_ref_idc values is 0 */
CHECK_EXPR(((GST_VAAPI_PICTURE_IS_REFERENCE(priv->current_picture) ^
(nalu->ref_idc != 0)) == 0), "nal_ref_idc");
/* POC type is 0 for both and either pic_order_cnt_lsb differs in
value or delta_pic_order_cnt_bottom differs in value */
if (sps->pic_order_cnt_type == 0) {
CHECK_VALUE(slice_hdr, prev_slice_hdr, pic_order_cnt_lsb);
if (pps->pic_order_present_flag && !slice_hdr->field_pic_flag)
CHECK_VALUE(slice_hdr, prev_slice_hdr, delta_pic_order_cnt_bottom);
}
/* POC type is 1 for both and either delta_pic_order_cnt[0]
differs in value or delta_pic_order_cnt[1] differs in value */
else if (sps->pic_order_cnt_type == 1) {
CHECK_VALUE(slice_hdr, prev_slice_hdr, delta_pic_order_cnt[0]);
CHECK_VALUE(slice_hdr, prev_slice_hdr, delta_pic_order_cnt[1]);
}
/* IdrPicFlag differs in value */
CHECK_EXPR(((GST_VAAPI_PICTURE_IS_IDR(priv->current_picture) ^
(nalu->type == GST_H264_NAL_SLICE_IDR)) == 0), "IdrPicFlag");
/* IdrPicFlag is equal to 1 for both and idr_pic_id differs in value */
if (GST_VAAPI_PICTURE_IS_IDR(priv->current_picture))
CHECK_VALUE(slice_hdr, prev_slice_hdr, idr_pic_id);
#undef CHECK_EXPR
#undef CHECK_VALUE
return FALSE;
}
static GstVaapiDecoderStatus
decode_picture(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu, GstH264SliceHdr *slice_hdr)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 *picture;
GstVaapiDecoderStatus status;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
status = decode_current_picture(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
status = ensure_context(decoder, sps);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
if (priv->current_picture) {
/* Re-use current picture where the first field was decoded */
picture = gst_vaapi_picture_h264_new_field(priv->current_picture);
if (!picture) {
GST_ERROR("failed to allocate field picture");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
}
else {
/* Create new picture */
picture = gst_vaapi_picture_h264_new(decoder);
if (!picture) {
GST_ERROR("failed to allocate picture");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
}
gst_vaapi_picture_replace(&priv->current_picture, picture);
gst_vaapi_picture_unref(picture);
picture->pps = pps;
status = ensure_quant_matrix(decoder, picture);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
GST_ERROR("failed to reset quantizer matrix");
return status;
}
if (!init_picture(decoder, picture, slice_hdr, nalu))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
if (!fill_picture(decoder, picture, slice_hdr, nalu))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static inline guint
get_slice_data_bit_offset(GstH264SliceHdr *slice_hdr, GstH264NalUnit *nalu)
{
guint epb_count;
epb_count = slice_hdr->n_emulation_prevention_bytes;
return 8 /* nal_unit_type */ + slice_hdr->header_size - epb_count * 8;
}
static gboolean
fill_pred_weight_table(GstVaapiDecoderH264 *decoder, GstVaapiSliceH264 *slice)
{
GstH264SliceHdr * const slice_hdr = &slice->slice_hdr;
GstH264PPS * const pps = slice_hdr->pps;
GstH264SPS * const sps = pps->sequence;
GstH264PredWeightTable * const w = &slice_hdr->pred_weight_table;
VASliceParameterBufferH264 * const slice_param = slice->base.param;
guint num_weight_tables = 0;
gint i, j;
if (pps->weighted_pred_flag &&
(GST_H264_IS_P_SLICE(slice_hdr) || GST_H264_IS_SP_SLICE(slice_hdr)))
num_weight_tables = 1;
else if (pps->weighted_bipred_idc == 1 && GST_H264_IS_B_SLICE(slice_hdr))
num_weight_tables = 2;
else
num_weight_tables = 0;
slice_param->luma_log2_weight_denom = w->luma_log2_weight_denom;
slice_param->chroma_log2_weight_denom = w->chroma_log2_weight_denom;
slice_param->luma_weight_l0_flag = 0;
slice_param->chroma_weight_l0_flag = 0;
slice_param->luma_weight_l1_flag = 0;
slice_param->chroma_weight_l1_flag = 0;
if (num_weight_tables < 1)
return TRUE;
slice_param->luma_weight_l0_flag = 1;
for (i = 0; i <= slice_param->num_ref_idx_l0_active_minus1; i++) {
slice_param->luma_weight_l0[i] = w->luma_weight_l0[i];
slice_param->luma_offset_l0[i] = w->luma_offset_l0[i];
}
slice_param->chroma_weight_l0_flag = sps->chroma_array_type != 0;
if (slice_param->chroma_weight_l0_flag) {
for (i = 0; i <= slice_param->num_ref_idx_l0_active_minus1; i++) {
for (j = 0; j < 2; j++) {
slice_param->chroma_weight_l0[i][j] = w->chroma_weight_l0[i][j];
slice_param->chroma_offset_l0[i][j] = w->chroma_offset_l0[i][j];
}
}
}
if (num_weight_tables < 2)
return TRUE;
slice_param->luma_weight_l1_flag = 1;
for (i = 0; i <= slice_param->num_ref_idx_l1_active_minus1; i++) {
slice_param->luma_weight_l1[i] = w->luma_weight_l1[i];
slice_param->luma_offset_l1[i] = w->luma_offset_l1[i];
}
slice_param->chroma_weight_l1_flag = sps->chroma_array_type != 0;
if (slice_param->chroma_weight_l1_flag) {
for (i = 0; i <= slice_param->num_ref_idx_l1_active_minus1; i++) {
for (j = 0; j < 2; j++) {
slice_param->chroma_weight_l1[i][j] = w->chroma_weight_l1[i][j];
slice_param->chroma_offset_l1[i][j] = w->chroma_offset_l1[i][j];
}
}
}
return TRUE;
}
static gboolean
fill_RefPicList(GstVaapiDecoderH264 *decoder, GstVaapiSliceH264 *slice)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264SliceHdr * const slice_hdr = &slice->slice_hdr;
VASliceParameterBufferH264 * const slice_param = slice->base.param;
guint i, num_ref_lists = 0;
slice_param->num_ref_idx_l0_active_minus1 = 0;
slice_param->num_ref_idx_l1_active_minus1 = 0;
if (GST_H264_IS_B_SLICE(slice_hdr))
num_ref_lists = 2;
else if (GST_H264_IS_I_SLICE(slice_hdr))
num_ref_lists = 0;
else
num_ref_lists = 1;
if (num_ref_lists < 1)
return TRUE;
slice_param->num_ref_idx_l0_active_minus1 =
slice_hdr->num_ref_idx_l0_active_minus1;
for (i = 0; i < priv->RefPicList0_count && priv->RefPicList0[i]; i++)
vaapi_fill_picture(&slice_param->RefPicList0[i], priv->RefPicList0[i], 0);
for (; i <= slice_param->num_ref_idx_l0_active_minus1; i++)
vaapi_init_picture(&slice_param->RefPicList0[i]);
if (num_ref_lists < 2)
return TRUE;
slice_param->num_ref_idx_l1_active_minus1 =
slice_hdr->num_ref_idx_l1_active_minus1;
for (i = 0; i < priv->RefPicList1_count && priv->RefPicList1[i]; i++)
vaapi_fill_picture(&slice_param->RefPicList1[i], priv->RefPicList1[i], 0);
for (; i <= slice_param->num_ref_idx_l1_active_minus1; i++)
vaapi_init_picture(&slice_param->RefPicList1[i]);
return TRUE;
}
static gboolean
fill_slice(
GstVaapiDecoderH264 *decoder,
GstVaapiSliceH264 *slice,
GstH264NalUnit *nalu
)
{
GstH264SliceHdr * const slice_hdr = &slice->slice_hdr;
VASliceParameterBufferH264 * const slice_param = slice->base.param;
/* Fill in VASliceParameterBufferH264 */
slice_param->slice_data_bit_offset = get_slice_data_bit_offset(slice_hdr, nalu);
slice_param->first_mb_in_slice = slice_hdr->first_mb_in_slice;
slice_param->slice_type = slice_hdr->type % 5;
slice_param->direct_spatial_mv_pred_flag = slice_hdr->direct_spatial_mv_pred_flag;
slice_param->cabac_init_idc = slice_hdr->cabac_init_idc;
slice_param->slice_qp_delta = slice_hdr->slice_qp_delta;
slice_param->disable_deblocking_filter_idc = slice_hdr->disable_deblocking_filter_idc;
slice_param->slice_alpha_c0_offset_div2 = slice_hdr->slice_alpha_c0_offset_div2;
slice_param->slice_beta_offset_div2 = slice_hdr->slice_beta_offset_div2;
if (!fill_RefPicList(decoder, slice))
return FALSE;
if (!fill_pred_weight_table(decoder, slice))
return FALSE;
return TRUE;
}
static GstVaapiDecoderStatus
decode_slice(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDecoderStatus status;
GstVaapiPictureH264 *picture;
GstVaapiSliceH264 *slice = NULL;
GstH264SliceHdr *slice_hdr;
GstH264ParserResult result;
GST_DEBUG("slice (%u bytes)", nalu->size);
slice = gst_vaapi_slice_h264_new(
decoder,
nalu->data + nalu->offset,
nalu->size
);
if (!slice) {
GST_ERROR("failed to allocate slice");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
slice_hdr = &slice->slice_hdr;
memset(slice_hdr, 0, sizeof(*slice_hdr));
result = gst_h264_parser_parse_slice_hdr(priv->parser, nalu, slice_hdr, TRUE, TRUE);
if (result != GST_H264_PARSER_OK) {
status = get_status(result);
goto error;
}
if (is_new_picture(decoder, nalu, slice_hdr)) {
status = decode_picture(decoder, nalu, slice_hdr);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
goto error;
}
picture = priv->current_picture;
if (!fill_slice(decoder, slice, nalu)) {
status = GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
goto error;
}
gst_vaapi_picture_add_slice(
GST_VAAPI_PICTURE_CAST(picture),
GST_VAAPI_SLICE_CAST(slice)
);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
error:
if (slice)
gst_mini_object_unref(GST_MINI_OBJECT(slice));
return status;
}
static inline gint
scan_for_start_code(GstAdapter *adapter, guint ofs, guint size, guint32 *scp)
{
return (gint)gst_adapter_masked_scan_uint32_peek(adapter,
0xffffff00, 0x00000100,
ofs, size,
scp);
}
static GstVaapiDecoderStatus
decode_nalu(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDecoderStatus status;
switch (nalu->type) {
case GST_H264_NAL_SLICE_IDR:
/* fall-through. IDR specifics are handled in init_picture() */
case GST_H264_NAL_SLICE:
if (!priv->got_sps || !priv->got_pps)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
status = decode_slice(decoder, nalu);
break;
case GST_H264_NAL_SPS:
status = decode_sps(decoder, nalu);
break;
case GST_H264_NAL_PPS:
status = decode_pps(decoder, nalu);
break;
case GST_H264_NAL_SEI:
status = decode_sei(decoder, nalu);
break;
case GST_H264_NAL_SEQ_END:
status = decode_sequence_end(decoder);
break;
case GST_H264_NAL_AU_DELIMITER:
/* skip all Access Unit NALs */
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
break;
case GST_H264_NAL_FILLER_DATA:
/* skip all Filler Data NALs */
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
break;
default:
GST_WARNING("unsupported NAL unit type %d", nalu->type);
status = GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
break;
}
return status;
}
static GstVaapiDecoderStatus
decode_buffer(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDecoderStatus status;
GstH264ParserResult result;
GstH264NalUnit nalu;
gboolean is_eos;
const guchar *buf;
guint i, buf_size, nalu_size, size;
guint32 start_code;
gint ofs;
buf = GST_BUFFER_DATA(buffer);
buf_size = GST_BUFFER_SIZE(buffer);
is_eos = GST_BUFFER_IS_EOS(buffer);
if (buf && buf_size > 0)
gst_adapter_push(priv->adapter, gst_buffer_ref(buffer));
size = gst_adapter_available(priv->adapter);
do {
if (size == 0) {
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
break;
}
status = gst_vaapi_decoder_check_status(GST_VAAPI_DECODER(decoder));
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
break;
status = GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
if (priv->is_avc) {
if (size < priv->nal_length_size)
break;
buf = gst_adapter_peek(priv->adapter, priv->nal_length_size);
nalu_size = 0;
for (i = 0; i < priv->nal_length_size; i++)
nalu_size = (nalu_size << 8) | buf[i];
buf_size = priv->nal_length_size + nalu_size;
if (size < buf_size)
break;
buffer = gst_adapter_take_buffer(priv->adapter, buf_size);
size -= buf_size;
buf = GST_BUFFER_DATA(buffer);
buf_size = GST_BUFFER_SIZE(buffer);
result = gst_h264_parser_identify_nalu_avc(
priv->parser,
buf, 0, buf_size, priv->nal_length_size,
&nalu
);
}
else {
if (size < 4)
break;
ofs = scan_for_start_code(priv->adapter, 0, size, &start_code);
if (ofs < 0)
break;
gst_adapter_flush(priv->adapter, ofs);
size -= ofs;
ofs = G_UNLIKELY(size < 8) ? -1 :
scan_for_start_code(priv->adapter, 4, size - 4, NULL);
if (ofs < 0) {
// Assume the whole NAL unit is present if end-of-stream
if (!is_eos)
break;
ofs = size;
}
buffer = gst_adapter_take_buffer(priv->adapter, ofs);
size -= ofs;
buf = GST_BUFFER_DATA(buffer);
buf_size = GST_BUFFER_SIZE(buffer);
result = gst_h264_parser_identify_nalu_unchecked(
priv->parser,
buf, 0, buf_size,
&nalu
);
}
status = get_status(result);
if (status == GST_VAAPI_DECODER_STATUS_SUCCESS)
status = decode_nalu(decoder, &nalu);
gst_buffer_unref(buffer);
} while (status == GST_VAAPI_DECODER_STATUS_SUCCESS);
if (is_eos && (status == GST_VAAPI_DECODER_STATUS_SUCCESS ||
status == GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA))
status = decode_sequence_end(decoder);
return status;
}
static GstVaapiDecoderStatus
decode_codec_data(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDecoderStatus status;
GstH264NalUnit nalu;
GstH264ParserResult result;
guchar *buf;
guint buf_size;
guint i, ofs, num_sps, num_pps;
buf = GST_BUFFER_DATA(buffer);
buf_size = GST_BUFFER_SIZE(buffer);
if (!buf || buf_size == 0)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (buf_size < 8)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
if (buf[0] != 1) {
GST_ERROR("failed to decode codec-data, not in avcC format");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
priv->nal_length_size = (buf[4] & 0x03) + 1;
num_sps = buf[5] & 0x1f;
ofs = 6;
for (i = 0; i < num_sps; i++) {
result = gst_h264_parser_identify_nalu_avc(
priv->parser,
buf, ofs, buf_size, 2,
&nalu
);
if (result != GST_H264_PARSER_OK)
return get_status(result);
status = decode_sps(decoder, &nalu);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
ofs = nalu.offset + nalu.size;
}
num_pps = buf[ofs];
ofs++;
for (i = 0; i < num_pps; i++) {
result = gst_h264_parser_identify_nalu_avc(
priv->parser,
buf, ofs, buf_size, 2,
&nalu
);
if (result != GST_H264_PARSER_OK)
return get_status(result);
status = decode_pps(decoder, &nalu);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
ofs = nalu.offset + nalu.size;
}
priv->is_avc = TRUE;
return status;
}
GstVaapiDecoderStatus
gst_vaapi_decoder_h264_decode(GstVaapiDecoder *base, GstBuffer *buffer)
{
GstVaapiDecoderH264 * const decoder = GST_VAAPI_DECODER_H264(base);
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiDecoderStatus status;
GstBuffer *codec_data;
g_return_val_if_fail(priv->is_constructed,
GST_VAAPI_DECODER_STATUS_ERROR_INIT_FAILED);
if (!priv->is_opened) {
priv->is_opened = gst_vaapi_decoder_h264_open(decoder, buffer);
if (!priv->is_opened)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC;
codec_data = GST_VAAPI_DECODER_CODEC_DATA(decoder);
if (codec_data) {
status = decode_codec_data(decoder, codec_data);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
}
}
return decode_buffer(decoder, buffer);
}
static void
gst_vaapi_decoder_h264_finalize(GObject *object)
{
GstVaapiDecoderH264 * const decoder = GST_VAAPI_DECODER_H264(object);
gst_vaapi_decoder_h264_destroy(decoder);
G_OBJECT_CLASS(gst_vaapi_decoder_h264_parent_class)->finalize(object);
}
static void
gst_vaapi_decoder_h264_constructed(GObject *object)
{
GstVaapiDecoderH264 * const decoder = GST_VAAPI_DECODER_H264(object);
GstVaapiDecoderH264Private * const priv = decoder->priv;
GObjectClass *parent_class;
parent_class = G_OBJECT_CLASS(gst_vaapi_decoder_h264_parent_class);
if (parent_class->constructed)
parent_class->constructed(object);
priv->is_constructed = gst_vaapi_decoder_h264_create(decoder);
}
static void
gst_vaapi_decoder_h264_class_init(GstVaapiDecoderH264Class *klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
GstVaapiDecoderClass * const decoder_class = GST_VAAPI_DECODER_CLASS(klass);
g_type_class_add_private(klass, sizeof(GstVaapiDecoderH264Private));
object_class->finalize = gst_vaapi_decoder_h264_finalize;
object_class->constructed = gst_vaapi_decoder_h264_constructed;
decoder_class->decode = gst_vaapi_decoder_h264_decode;
}
static void
gst_vaapi_decoder_h264_init(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private *priv;
priv = GST_VAAPI_DECODER_H264_GET_PRIVATE(decoder);
decoder->priv = priv;
priv->parser = NULL;
priv->current_picture = NULL;
priv->dpb_count = 0;
priv->dpb_size = 0;
priv->profile = GST_VAAPI_PROFILE_UNKNOWN;
priv->entrypoint = GST_VAAPI_ENTRYPOINT_VLD;
priv->chroma_type = GST_VAAPI_CHROMA_TYPE_YUV420;
priv->short_ref_count = 0;
priv->long_ref_count = 0;
priv->RefPicList0_count = 0;
priv->RefPicList1_count = 0;
priv->nal_length_size = 0;
priv->adapter = NULL;
priv->field_poc[0] = 0;
priv->field_poc[1] = 0;
priv->poc_msb = 0;
priv->poc_lsb = 0;
priv->prev_poc_msb = 0;
priv->prev_poc_lsb = 0;
priv->frame_num_offset = 0;
priv->frame_num = 0;
priv->prev_frame_num = 0;
priv->prev_pic_has_mmco5 = FALSE;
priv->prev_pic_structure = GST_VAAPI_PICTURE_STRUCTURE_FRAME;
priv->is_constructed = FALSE;
priv->is_opened = FALSE;
priv->is_avc = FALSE;
priv->has_context = FALSE;
priv->progressive_sequence = TRUE;
memset(priv->dpb, 0, sizeof(priv->dpb));
memset(priv->short_ref, 0, sizeof(priv->short_ref));
memset(priv->long_ref, 0, sizeof(priv->long_ref));
memset(priv->RefPicList0, 0, sizeof(priv->RefPicList0));
memset(priv->RefPicList1, 0, sizeof(priv->RefPicList1));
}
/**
* gst_vaapi_decoder_h264_new:
* @display: a #GstVaapiDisplay
* @caps: a #GstCaps holding codec information
*
* Creates a new #GstVaapiDecoder for MPEG-2 decoding. The @caps can
* hold extra information like codec-data and pictured coded size.
*
* Return value: the newly allocated #GstVaapiDecoder object
*/
GstVaapiDecoder *
gst_vaapi_decoder_h264_new(GstVaapiDisplay *display, GstCaps *caps)
{
GstVaapiDecoderH264 *decoder;
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY(display), NULL);
g_return_val_if_fail(GST_IS_CAPS(caps), NULL);
decoder = g_object_new(
GST_VAAPI_TYPE_DECODER_H264,
"display", display,
"caps", caps,
NULL
);
if (!decoder->priv->is_constructed) {
g_object_unref(decoder);
return NULL;
}
return GST_VAAPI_DECODER_CAST(decoder);
}
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