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gstreamer/gst-libs/gst/vaapi/gstvaapidecoder_h264.c
Gwenole Beauchesne 04bbd8cc11 h264: move MMCO handlers out of the loop (cosmetics). 
This change only splits each individual MMCO handler into several functions
dedicated for each operation. This is needed to perform further work later
on.
2012-10-22 17:21:32 +02:00

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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 _GstVaapiPictureH264 GstVaapiPictureH264;
typedef struct _GstVaapiPictureH264Class GstVaapiPictureH264Class;
typedef struct _GstVaapiSliceH264 GstVaapiSliceH264;
typedef struct _GstVaapiSliceH264Class GstVaapiSliceH264Class;
/* ------------------------------------------------------------------------- */
/* --- 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))
struct _GstVaapiPictureH264 {
GstVaapiPicture base;
VAPictureH264 info;
gint32 poc;
gint32 frame_num; // Original frame_num from slice_header()
gint32 frame_num_wrap; // Temporary for ref pic marking: FrameNumWrap
gint32 pic_num; // Temporary for ref pic marking: PicNum
gint32 long_term_pic_num; // Temporary for ref pic marking: LongTermPicNum
guint is_idr : 1;
guint is_long_term : 1;
guint field_pic_flag : 1;
guint bottom_field_flag : 1;
guint has_mmco_5 : 1;
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)
{
VAPictureH264 *va_pic;
va_pic = &picture->info;
va_pic->flags = 0;
va_pic->TopFieldOrderCnt = 0;
va_pic->BottomFieldOrderCnt = 0;
picture->poc = 0;
picture->is_long_term = FALSE;
picture->is_idr = FALSE;
picture->has_mmco_5 = FALSE;
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);
}
/* ------------------------------------------------------------------------- */
/* --- 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);
}
/* ------------------------------------------------------------------------- */
/* --- 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))
// Used for field_poc[]
#define TOP_FIELD 0
#define BOTTOM_FIELD 1
struct _GstVaapiDecoderH264Private {
GstAdapter *adapter;
GstH264NalParser *parser;
GstH264SPS *sps;
GstH264SPS last_sps;
GstH264PPS *pps;
GstH264PPS last_pps;
GstVaapiPictureH264 *current_picture;
GstVaapiPictureH264 *dpb[16];
guint dpb_count;
guint dpb_size;
GstVaapiProfile profile;
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 width;
guint height;
guint mb_x;
guint mb_y;
guint mb_width;
guint mb_height;
guint8 scaling_list_4x4[6][16];
guint8 scaling_list_8x8[6][64];
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 prev_frame_num_offset; // prevFrameNumOffset
gint32 frame_num; // frame_num (from slice_header())
gint32 prev_frame_num; // prevFrameNum
guint is_constructed : 1;
guint is_opened : 1;
guint is_avc : 1;
guint has_context : 1;
};
static gboolean
decode_picture_end(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture);
static void
clear_references(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 **pictures,
guint *picture_count
);
/* 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
dpb_remove_index(GstVaapiDecoderH264 *decoder, guint index)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i, num_pictures = --priv->dpb_count;
if (USE_STRICT_DPB_ORDERING) {
for (i = index; i < num_pictures; i++)
gst_vaapi_picture_replace(&priv->dpb[i], priv->dpb[i + 1]);
}
else if (index != num_pictures)
gst_vaapi_picture_replace(&priv->dpb[index], priv->dpb[num_pictures]);
gst_vaapi_picture_replace(&priv->dpb[num_pictures], NULL);
}
static inline gboolean
dpb_output(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
/* XXX: update cropping rectangle */
picture->output_needed = FALSE;
return gst_vaapi_picture_output(GST_VAAPI_PICTURE_CAST(picture));
}
static gboolean
dpb_bump(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i, lowest_poc_index;
gboolean success;
for (i = 0; i < priv->dpb_count; i++) {
if (priv->dpb[i]->output_needed)
break;
}
if (i == priv->dpb_count)
return FALSE;
lowest_poc_index = i++;
for (; i < priv->dpb_count; i++) {
GstVaapiPictureH264 * const picture = priv->dpb[i];
if (picture->output_needed && picture->poc < priv->dpb[lowest_poc_index]->poc)
lowest_poc_index = i;
}
success = dpb_output(decoder, priv->dpb[lowest_poc_index]);
if (!GST_VAAPI_PICTURE_IS_REFERENCE(priv->dpb[lowest_poc_index]))
dpb_remove_index(decoder, lowest_poc_index);
return success;
}
static void
dpb_flush(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
while (dpb_bump(decoder))
;
clear_references(decoder, priv->dpb, &priv->dpb_count);
}
static gboolean
dpb_add(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
guint i;
// Remove all unused pictures
if (picture->is_idr)
dpb_flush(decoder);
else {
i = 0;
while (i < priv->dpb_count) {
GstVaapiPictureH264 * const picture = priv->dpb[i];
if (!picture->output_needed &&
!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
dpb_remove_index(decoder, i);
else
i++;
}
}
// 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_picture_replace(&priv->dpb[priv->dpb_count++], picture);
if (picture->output_flag)
picture->output_needed = TRUE;
}
// 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) {
for (i = 0; i < priv->dpb_count; i++) {
if (priv->dpb[i]->output_needed &&
priv->dpb[i]->poc < picture->poc)
break;
}
if (i == priv->dpb_count)
return dpb_output(decoder, picture);
if (!dpb_bump(decoder))
return FALSE;
}
gst_vaapi_picture_replace(&priv->dpb[priv->dpb_count++], picture);
picture->output_needed = TRUE;
}
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 inline GstH264DecRefPicMarking *
get_dec_ref_pic_marking(GstVaapiPictureH264 *picture_h264)
{
GstVaapiPicture * const picture = GST_VAAPI_PICTURE_CAST(picture_h264);
GstVaapiSliceH264 *slice;
slice = g_ptr_array_index(picture->slices, picture->slices->len - 1);
return &slice->slice_hdr.dec_ref_pic_marking;
}
static void
gst_vaapi_decoder_h264_close(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
gst_vaapi_picture_replace(&priv->current_picture, NULL);
clear_references(decoder, priv->short_ref, &priv->short_ref_count);
clear_references(decoder, priv->long_ref, &priv->long_ref_count );
clear_references(decoder, priv->dpb, &priv->dpb_count );
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 GstVaapiDecoderStatus
ensure_context(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiProfile profiles[2];
GstVaapiEntrypoint entrypoint = GST_VAAPI_ENTRYPOINT_VLD;
guint i, n_profiles = 0;
gboolean success, reset_context = FALSE;
if (!priv->has_context || priv->sps->profile_idc != sps->profile_idc) {
GST_DEBUG("profile changed");
reset_context = TRUE;
switch (sps->profile_idc) {
case 66:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_BASELINE;
break;
case 77:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_MAIN;
// fall-through
case 100:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_HIGH;
break;
default:
GST_DEBUG("unsupported profile %d", sps->profile_idc);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
}
for (i = 0; i < n_profiles; i++) {
success = gst_vaapi_display_has_decoder(
GST_VAAPI_DECODER_DISPLAY(decoder),
profiles[i],
entrypoint
);
if (success)
break;
}
if (i == n_profiles)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
priv->profile = profiles[i];
}
if (!priv->has_context ||
priv->sps->chroma_format_idc != sps->chroma_format_idc) {
GST_DEBUG("chroma format changed");
reset_context = TRUE;
/* XXX: theoritically, we could handle 4:2:2 format */
if (sps->chroma_format_idc != 1)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT;
}
if (!priv->has_context ||
priv->sps->width != sps->width ||
priv->sps->height != sps->height) {
GST_DEBUG("size changed");
reset_context = TRUE;
priv->width = sps->width;
priv->height = sps->height;
priv->mb_width = sps->pic_width_in_mbs_minus1 + 1;
priv->mb_height = sps->pic_height_in_map_units_minus1 + 1;
priv->mb_height *= 2 - sps->frame_mbs_only_flag;
}
if (reset_context) {
GstVaapiContextInfo info;
info.profile = priv->profile;
info.entrypoint = entrypoint;
info.width = priv->width;
info.height = priv->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 GstVaapiDecoderStatus
ensure_quant_matrix(GstVaapiDecoderH264 *decoder, GstH264PPS *pps)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
if (priv->pps != pps) {
memcpy(priv->scaling_list_4x4, pps->scaling_lists_4x4,
sizeof(priv->scaling_list_4x4));
memcpy(priv->scaling_list_8x8, pps->scaling_lists_8x8,
sizeof(priv->scaling_list_8x8));
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static gboolean
decode_current_picture(GstVaapiDecoderH264 *decoder)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPictureH264 * const picture = priv->current_picture;
gboolean success = FALSE;
if (!picture)
return TRUE;
if (!decode_picture_end(decoder, picture))
goto end;
if (!gst_vaapi_picture_decode(GST_VAAPI_PICTURE_CAST(picture)))
goto end;
success = TRUE;
end:
gst_vaapi_picture_replace(&priv->current_picture, NULL);
return success;
}
static GstVaapiDecoderStatus
decode_sps(GstVaapiDecoderH264 *decoder, GstH264NalUnit *nalu)
{
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER(decoder);
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264SPS * const sps = &priv->last_sps;
GstH264ParserResult result;
GST_DEBUG("decode SPS");
if (priv->current_picture && !decode_current_picture(decoder))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
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);
gst_vaapi_decoder_set_pixel_aspect_ratio(
base_decoder,
sps->vui_parameters.par_n,
sps->vui_parameters.par_d
);
return ensure_context(decoder, sps);
}
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");
if (priv->current_picture && !decode_current_picture(decoder))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
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);
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)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GST_DEBUG("decode sequence-end");
if (priv->current_picture && !decode_current_picture(decoder))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
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);
GST_DEBUG("decode picture order count type 0");
// (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;
// (8-4)
if (!slice_hdr->field_pic_flag || !slice_hdr->bottom_field_flag)
priv->field_poc[TOP_FIELD] = priv->poc_msb + priv->poc_lsb;
// (8-5)
if (!slice_hdr->field_pic_flag)
priv->field_poc[BOTTOM_FIELD] = priv->field_poc[TOP_FIELD] +
slice_hdr->delta_pic_order_cnt_bottom;
else if (slice_hdr->bottom_field_flag)
priv->field_poc[BOTTOM_FIELD] = priv->poc_msb + priv->poc_lsb;
}
/* 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 abs_frame_num, expected_poc;
guint i;
GST_DEBUG("decode picture order count type 1");
// (8-6)
if (picture->is_idr)
priv->frame_num_offset = 0;
else if (priv->prev_frame_num > priv->frame_num)
priv->frame_num_offset = priv->prev_frame_num_offset + MaxFrameNum;
else
priv->frame_num_offset = priv->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)
if (!slice_hdr->field_pic_flag) {
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];
}
else if (!slice_hdr->bottom_field_flag)
priv->field_poc[TOP_FIELD] = expected_poc +
slice_hdr->delta_pic_order_cnt[0];
else
priv->field_poc[BOTTOM_FIELD] = expected_poc +
sps->offset_for_top_to_bottom_field + slice_hdr->delta_pic_order_cnt[0];
}
/* 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);
guint temp_poc;
GST_DEBUG("decode picture order count type 2");
// (8-11)
if (picture->is_idr)
priv->frame_num_offset = 0;
else if (priv->prev_frame_num > priv->frame_num)
priv->frame_num_offset = priv->prev_frame_num_offset + MaxFrameNum;
else
priv->frame_num_offset = priv->prev_frame_num_offset;
// (8-12)
if (picture->is_idr)
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 (!slice_hdr->field_pic_flag) {
priv->field_poc[TOP_FIELD] = temp_poc;
priv->field_poc[BOTTOM_FIELD] = temp_poc;
}
else if (slice_hdr->bottom_field_flag)
priv->field_poc[BOTTOM_FIELD] = temp_poc;
else
priv->field_poc[TOP_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;
VAPictureH264 * const pic = &picture->info;
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 (!(pic->flags & VA_PICTURE_H264_BOTTOM_FIELD))
pic->TopFieldOrderCnt = priv->field_poc[TOP_FIELD];
if (!(pic->flags & VA_PICTURE_H264_TOP_FIELD))
pic->BottomFieldOrderCnt = priv->field_poc[BOTTOM_FIELD];
picture->poc = MIN(pic->TopFieldOrderCnt, pic->BottomFieldOrderCnt);
}
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->poc - picA->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->poc - picB->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->info.frame_idx - picB->info.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);
const guint field_flags = VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD;
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 (!pic->field_pic_flag)
pic->pic_num = pic->frame_num_wrap;
else {
if (((picture->info.flags ^ pic->info.flags) & field_flags) == 0)
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 (!pic->field_pic_flag)
pic->long_term_pic_num = pic->info.frame_idx;
else {
if (((picture->info.flags ^ pic->info.flags) & field_flags) == 0)
pic->long_term_pic_num = 2 * pic->info.frame_idx + 1;
else
pic->long_term_pic_num = 2 * pic->info.frame_idx;
}
}
}
#define SORT_REF_LIST(list, n, compare_func) \
qsort(list, n, sizeof(*(list)), compare_picture_##compare_func)
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 (!picture->field_pic_flag) {
/* 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;
// XXX: handle second field if current field is marked as
// "used for short-term reference"
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;
}
// XXX: handle second field if current field is marked as
// "used for long-term reference"
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;
}
// XXX: handle 8.2.4.2.5
}
}
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 (!picture->field_pic_flag) {
/* 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]->poc < picture->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]->poc >= picture->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]->poc > picture->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]->poc <= picture->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]->poc <= picture->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]->poc > picture->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]->poc > picture->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]->poc <= picture->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;
}
// XXX: handle 8.2.4.2.5
}
/* 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 void
clear_references(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 **pictures,
guint *picture_count
)
{
const guint num_pictures = *picture_count;
guint i;
for (i = 0; i < num_pictures; i++)
gst_vaapi_picture_replace(&pictures[i], NULL);
*picture_count = 0;
}
static gboolean
remove_reference_at(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 **pictures,
guint *picture_count,
guint index
)
{
guint num_pictures = *picture_count;
g_return_val_if_fail(index < num_pictures, FALSE);
GST_VAAPI_PICTURE_FLAG_UNSET(pictures[index], GST_VAAPI_PICTURE_FLAG_REFERENCE);
if (index != --num_pictures)
gst_vaapi_picture_replace(&pictures[index], pictures[num_pictures]);
gst_vaapi_picture_replace(&pictures[num_pictures], NULL);
*picture_count = num_pictures;
return TRUE;
}
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 (picture->field_pic_flag) {
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 = ref_list[j]->is_long_term ?
MaxPicNum : ref_list[j]->pic_num;
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 = ref_list[j]->is_long_term ?
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 gboolean
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_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;
}
return TRUE;
}
static gboolean
init_picture(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr,
GstH264NalUnit *nalu
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPicture * const base_picture = &picture->base;
VAPictureH264 *pic;
guint i;
priv->frame_num = slice_hdr->frame_num;
picture->frame_num = priv->frame_num;
picture->frame_num_wrap = priv->frame_num;
picture->is_idr = nalu->type == GST_H264_NAL_SLICE_IDR;
picture->field_pic_flag = slice_hdr->field_pic_flag;
picture->bottom_field_flag = slice_hdr->bottom_field_flag;
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 (picture->is_idr) {
GST_DEBUG("<IDR>");
clear_references(decoder, priv->short_ref, &priv->short_ref_count);
clear_references(decoder, priv->long_ref, &priv->long_ref_count );
priv->prev_poc_msb = 0;
priv->prev_poc_lsb = 0;
}
/* Initialize VA picture info */
pic = &picture->info;
pic->picture_id = picture->base.surface_id;
pic->frame_idx = priv->frame_num;
if (picture->field_pic_flag) {
if (picture->bottom_field_flag)
pic->flags |= VA_PICTURE_H264_BOTTOM_FIELD;
else
pic->flags |= VA_PICTURE_H264_TOP_FIELD;
}
/* Initialize base picture */
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;
}
if (nalu->ref_idc) {
GstH264DecRefPicMarking * const dec_ref_pic_marking =
&slice_hdr->dec_ref_pic_marking;
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_REFERENCE);
if (picture->is_idr) {
if (dec_ref_pic_marking->long_term_reference_flag)
picture->is_long_term = TRUE;
}
else if (dec_ref_pic_marking->adaptive_ref_pic_marking_mode_flag) {
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];
switch (ref_pic_marking->memory_management_control_operation) {
case 3:
case 6:
picture->is_long_term = TRUE;
pic->frame_idx = ref_pic_marking->long_term_frame_idx;
break;
case 5:
picture->has_mmco_5 = TRUE;
break;
}
}
}
if (picture->is_long_term)
pic->flags |= VA_PICTURE_H264_LONG_TERM_REFERENCE;
else
pic->flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
}
init_picture_poc(decoder, picture, slice_hdr);
if (!init_picture_refs(decoder, picture, slice_hdr)) {
GST_ERROR("failed to initialize references");
return FALSE;
}
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;
GstH264SPS * const sps = priv->sps;
guint i, max_num_ref_frames, lowest_frame_num_index;
gint32 lowest_frame_num;
GST_DEBUG("reference picture marking process (sliding window)");
max_num_ref_frames = sps->num_ref_frames;
if (max_num_ref_frames == 0)
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;
lowest_frame_num = priv->short_ref[0]->frame_num_wrap;
lowest_frame_num_index = 0;
for (i = 1; i < priv->short_ref_count; i++) {
if (priv->short_ref[i]->frame_num_wrap < lowest_frame_num) {
lowest_frame_num = priv->short_ref[i]->frame_num_wrap;
lowest_frame_num_index = i;
}
}
remove_reference_at(
decoder,
priv->short_ref, &priv->short_ref_count,
lowest_frame_num_index
);
return TRUE;
}
static inline gint32
get_picNumX(GstVaapiPictureH264 *picture, GstH264RefPicMarking *ref_pic_marking)
{
gint32 pic_num;
if (!picture->field_pic_flag)
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-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;
remove_reference_at(decoder, priv->short_ref, &priv->short_ref_count, 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, picture->long_term_pic_num);
if (i < 0)
return;
remove_reference_at(decoder, priv->long_ref, &priv->long_ref_count, 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
)
{
gint32 i, picNumX;
picNumX = get_picNumX(picture, ref_pic_marking);
i = find_short_term_reference(decoder, picNumX);
if (i < 0)
return;
}
/* 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;
clear_references(decoder, priv->short_ref, &priv->short_ref_count);
clear_references(decoder, priv->long_ref, &priv->long_ref_count );
}
/* 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,
NULL,
exec_ref_pic_marking_adaptive_mmco_5,
};
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;
GstVaapiPictureH264 **picture_ptr;
if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
return TRUE;
if (!picture->is_idr) {
GstH264DecRefPicMarking * const dec_ref_pic_marking =
get_dec_ref_pic_marking(picture);
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;
}
}
if (picture->is_long_term)
picture_ptr = &priv->long_ref[priv->long_ref_count++];
else
picture_ptr = &priv->short_ref[priv->short_ref_count++];
gst_vaapi_picture_replace(picture_ptr, picture);
return TRUE;
}
/* Update picture order count */
static void
exit_picture_poc(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstH264SPS * const sps = priv->sps;
switch (sps->pic_order_cnt_type) {
case 0:
if (!GST_VAAPI_PICTURE_IS_REFERENCE(picture))
break;
if (picture->has_mmco_5) {
priv->prev_poc_msb = 0;
if (!picture->field_pic_flag || !picture->bottom_field_flag)
priv->prev_poc_lsb = picture->info.TopFieldOrderCnt;
else
priv->prev_poc_lsb = 0;
}
else {
priv->prev_poc_msb = priv->poc_msb;
priv->prev_poc_lsb = priv->poc_lsb;
}
break;
case 1:
case 2:
priv->prev_frame_num = priv->frame_num;
if (picture->has_mmco_5)
priv->prev_frame_num_offset = 0;
else
priv->prev_frame_num_offset = priv->frame_num_offset;
break;
}
}
static inline gboolean
exit_picture(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
/* Update picture order count */
exit_picture_poc(decoder, picture);
/* Decoded reference picture marking process */
if (!exec_ref_pic_marking(decoder, picture))
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 gboolean
fill_picture(
GstVaapiDecoderH264 *decoder,
GstVaapiPictureH264 *picture,
GstH264SliceHdr *slice_hdr,
GstH264NalUnit *nalu
)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
GstVaapiPicture * const base_picture = &picture->base;
GstH264SPS * const sps = priv->sps;
GstH264PPS * const pps = priv->pps;
VAPictureParameterBufferH264 * const pic_param = base_picture->param;
guint i, n;
/* Fill in VAPictureParameterBufferH264 */
pic_param->CurrPic = picture->info;
for (i = 0, n = 0; i < priv->short_ref_count; i++)
pic_param->ReferenceFrames[n++] = priv->short_ref[i]->info;
for (i = 0; i < priv->long_ref_count; i++)
pic_param->ReferenceFrames[n++] = priv->long_ref[i]->info;
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;
}
static gboolean
fill_quant_matrix(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = decoder->priv;
VAIQMatrixBufferH264 * const iq_matrix = picture->base.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 (priv->sps->chroma_format_idc == 3 &&
sizeof(iq_matrix->ScalingList8x8) != sizeof(priv->scaling_list_8x8))
return FALSE;
/* Fill in VAIQMatrixBufferH264 */
memcpy(iq_matrix->ScalingList4x4, priv->scaling_list_4x4,
sizeof(iq_matrix->ScalingList4x4));
memcpy(iq_matrix->ScalingList8x8, priv->scaling_list_8x8,
sizeof(iq_matrix->ScalingList8x8));
return TRUE;
}
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 = ensure_context(decoder, sps);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
GST_ERROR("failed to reset context");
return status;
}
if (priv->current_picture && !decode_current_picture(decoder))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
picture = gst_vaapi_picture_h264_new(decoder);
if (!picture) {
GST_ERROR("failed to allocate picture");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
priv->current_picture = picture;
picture->base.iq_matrix = GST_VAAPI_IQ_MATRIX_NEW(H264, decoder);
if (!picture->base.iq_matrix) {
GST_ERROR("failed to allocate IQ matrix");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
status = ensure_quant_matrix(decoder, pps);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
GST_ERROR("failed to reset quantizer matrix");
return status;
}
priv->sps = sps;
priv->pps = pps;
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 gboolean
decode_picture_end(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
if (!fill_quant_matrix(decoder, picture))
return FALSE;
if (!exit_picture(decoder, picture))
return FALSE;
if (!dpb_add(decoder, picture))
return FALSE;
return TRUE;
}
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++)
slice_param->RefPicList0[i] = priv->RefPicList0[i]->info;
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++)
slice_param->RefPicList1[i] = priv->RefPicList1[i]->info;
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 (slice_hdr->first_mb_in_slice == 0) {
status = decode_picture(decoder, nalu, slice_hdr);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
goto error;
}
picture = priv->current_picture;
priv->mb_x = slice_hdr->first_mb_in_slice % priv->mb_width;
priv->mb_y = slice_hdr->first_mb_in_slice / priv->mb_width; // FIXME: MBAFF or field
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)
);
/* Commit picture for decoding if we reached the last slice */
if (++priv->mb_y >= priv->mb_height) {
if (!decode_current_picture(decoder)) {
status = GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
goto error;
}
GST_DEBUG("done");
}
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)
{
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:
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->sps = &priv->last_sps;
priv->pps = &priv->last_pps;
priv->current_picture = NULL;
priv->dpb_count = 0;
priv->dpb_size = 0;
priv->profile = GST_VAAPI_PROFILE_H264_HIGH;
priv->short_ref_count = 0;
priv->long_ref_count = 0;
priv->RefPicList0_count = 0;
priv->RefPicList1_count = 0;
priv->nal_length_size = 0;
priv->width = 0;
priv->height = 0;
priv->mb_x = 0;
priv->mb_y = 0;
priv->mb_width = 0;
priv->mb_height = 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->prev_frame_num_offset = 0;
priv->frame_num = 0;
priv->prev_frame_num = 0;
priv->is_constructed = FALSE;
priv->is_opened = FALSE;
priv->is_avc = FALSE;
priv->has_context = FALSE;
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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