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gstreamer/gst-libs/gst/vaapi/gstvaapidecoder_vc1.c
Gwenole Beauchesne 15519ebe3d legal: add per-file authorship information. 
Credit original authors on a per-file basis as we cannot expect people
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2013-11-22 06:39:15 +01:00

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/*
* gstvaapidecoder_vc1.c - VC-1 decoder
*
* Copyright (C) 2011-2013 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* 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_vc1
* @short_description: VC-1 decoder
*/
#include "sysdeps.h"
#include <string.h>
#include <gst/codecparsers/gstvc1parser.h>
#include "gstvaapidecoder_vc1.h"
#include "gstvaapidecoder_objects.h"
#include "gstvaapidecoder_dpb.h"
#include "gstvaapidecoder_unit.h"
#include "gstvaapidecoder_priv.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapiobject_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
#define GST_VAAPI_DECODER_VC1_CAST(decoder) \
((GstVaapiDecoderVC1 *)(decoder))
typedef struct _GstVaapiDecoderVC1Private GstVaapiDecoderVC1Private;
typedef struct _GstVaapiDecoderVC1Class GstVaapiDecoderVC1Class;
/**
* GstVaapiDecoderVC1:
*
* A decoder based on VC1.
*/
struct _GstVaapiDecoderVC1Private {
GstVaapiProfile profile;
guint width;
guint height;
GstVC1SeqHdr seq_hdr;
GstVC1EntryPointHdr entrypoint_hdr;
GstVC1FrameHdr frame_hdr;
GstVC1BitPlanes *bitplanes;
GstVaapiPicture *current_picture;
GstVaapiPicture *last_non_b_picture;
GstVaapiDpb *dpb;
gint32 next_poc;
guint8 *rbdu_buffer;
guint rbdu_buffer_size;
guint is_opened : 1;
guint is_first_field : 1;
guint has_codec_data : 1;
guint has_entrypoint : 1;
guint size_changed : 1;
guint profile_changed : 1;
guint closed_entry : 1;
guint broken_link : 1;
};
/**
* GstVaapiDecoderVC1:
*
* A decoder based on VC1.
*/
struct _GstVaapiDecoderVC1 {
/*< private >*/
GstVaapiDecoder parent_instance;
GstVaapiDecoderVC1Private priv;
};
/**
* GstVaapiDecoderVC1Class:
*
* A decoder class based on VC1.
*/
struct _GstVaapiDecoderVC1Class {
/*< private >*/
GstVaapiDecoderClass parent_class;
};
static GstVaapiDecoderStatus
get_status(GstVC1ParserResult result)
{
GstVaapiDecoderStatus status;
switch (result) {
case GST_VC1_PARSER_OK:
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
break;
case GST_VC1_PARSER_NO_BDU_END:
status = GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
break;
case GST_VC1_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_vc1_close(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
gst_vaapi_picture_replace(&priv->last_non_b_picture, NULL);
gst_vaapi_picture_replace(&priv->current_picture, NULL);
gst_vaapi_dpb_replace(&priv->dpb, NULL);
if (priv->bitplanes) {
gst_vc1_bitplanes_free(priv->bitplanes);
priv->bitplanes = NULL;
}
}
static gboolean
gst_vaapi_decoder_vc1_open(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
gst_vaapi_decoder_vc1_close(decoder);
priv->dpb = gst_vaapi_dpb_new(2);
if (!priv->dpb)
return FALSE;
priv->bitplanes = gst_vc1_bitplanes_new();
if (!priv->bitplanes)
return FALSE;
return TRUE;
}
static void
gst_vaapi_decoder_vc1_destroy(GstVaapiDecoder *base_decoder)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
gst_vaapi_decoder_vc1_close(decoder);
if (priv->rbdu_buffer) {
g_free(priv->rbdu_buffer);
priv->rbdu_buffer = NULL;
priv->rbdu_buffer_size = 0;
}
}
static gboolean
gst_vaapi_decoder_vc1_create(GstVaapiDecoder *base_decoder)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
priv->profile = (GstVaapiProfile)0;
return TRUE;
}
static GstVaapiDecoderStatus
ensure_context(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiProfile profiles[2];
GstVaapiEntrypoint entrypoint = GST_VAAPI_ENTRYPOINT_VLD;
guint i, n_profiles = 0;
gboolean reset_context = FALSE;
if (priv->profile_changed) {
GST_DEBUG("profile changed");
priv->profile_changed = FALSE;
reset_context = TRUE;
profiles[n_profiles++] = priv->profile;
if (priv->profile == GST_VAAPI_PROFILE_VC1_SIMPLE)
profiles[n_profiles++] = GST_VAAPI_PROFILE_VC1_MAIN;
for (i = 0; i < n_profiles; i++) {
if (gst_vaapi_display_has_decoder(GST_VAAPI_DECODER_DISPLAY(decoder),
profiles[i], entrypoint))
break;
}
if (i == n_profiles)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
priv->profile = profiles[i];
}
if (priv->size_changed) {
GST_DEBUG("size changed");
priv->size_changed = FALSE;
reset_context = TRUE;
}
if (reset_context) {
GstVaapiContextInfo info;
info.profile = priv->profile;
info.entrypoint = entrypoint;
info.width = priv->width;
info.height = priv->height;
info.ref_frames = 2;
reset_context = gst_vaapi_decoder_ensure_context(
GST_VAAPI_DECODER(decoder),
&info
);
if (!reset_context)
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_current_picture(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiPicture * const picture = priv->current_picture;
if (!picture)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (!gst_vaapi_picture_decode(picture))
goto error;
if (GST_VAAPI_PICTURE_IS_COMPLETE(picture)) {
if (!gst_vaapi_dpb_add(priv->dpb, picture))
goto error;
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_sequence(GstVaapiDecoderVC1 *decoder, GstVC1BDU *rbdu, GstVC1BDU *ebdu)
{
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER(decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1AdvancedSeqHdr * const adv_hdr = &seq_hdr->advanced;
GstVC1SeqStructC * const structc = &seq_hdr->struct_c;
GstVC1ParserResult result;
GstVaapiProfile profile;
guint width, height, fps_n, fps_d, par_n, par_d;
result = gst_vc1_parse_sequence_header(
rbdu->data + rbdu->offset,
rbdu->size,
seq_hdr
);
if (result != GST_VC1_PARSER_OK) {
GST_ERROR("failed to parse sequence layer");
return get_status(result);
}
priv->has_entrypoint = FALSE;
/* Reset POC */
if (priv->last_non_b_picture) {
if (priv->last_non_b_picture->poc == priv->next_poc)
priv->next_poc++;
gst_vaapi_picture_replace(&priv->last_non_b_picture, NULL);
}
/* Validate profile */
switch (seq_hdr->profile) {
case GST_VC1_PROFILE_SIMPLE:
case GST_VC1_PROFILE_MAIN:
case GST_VC1_PROFILE_ADVANCED:
break;
default:
GST_ERROR("unsupported profile %d", seq_hdr->profile);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
}
fps_n = 0;
fps_d = 0;
par_n = 0;
par_d = 0;
switch (seq_hdr->profile) {
case GST_VC1_PROFILE_SIMPLE:
case GST_VC1_PROFILE_MAIN:
if (structc->wmvp) {
fps_n = structc->framerate;
fps_d = 1;
}
break;
case GST_VC1_PROFILE_ADVANCED:
fps_n = adv_hdr->fps_n;
fps_d = adv_hdr->fps_d;
par_n = adv_hdr->par_n;
par_d = adv_hdr->par_d;
break;
default:
g_assert(0 && "XXX: we already validated the profile above");
break;
}
if (fps_n && fps_d)
gst_vaapi_decoder_set_framerate(base_decoder, fps_n, fps_d);
if (par_n > 0 && par_d > 0)
gst_vaapi_decoder_set_pixel_aspect_ratio(base_decoder, par_n, par_d);
switch (seq_hdr->profile) {
case GST_VC1_PROFILE_SIMPLE:
case GST_VC1_PROFILE_MAIN:
width = seq_hdr->struct_c.coded_width;
height = seq_hdr->struct_c.coded_height;
break;
case GST_VC1_PROFILE_ADVANCED:
width = seq_hdr->advanced.max_coded_width;
height = seq_hdr->advanced.max_coded_height;
break;
default:
g_assert(0 && "XXX: we already validated the profile above");
break;
}
if (priv->width != width) {
priv->width = width;
priv->size_changed = TRUE;
}
if (priv->height != height) {
priv->height = height;
priv->size_changed = TRUE;
}
switch (seq_hdr->profile) {
case GST_VC1_PROFILE_SIMPLE:
profile = GST_VAAPI_PROFILE_VC1_SIMPLE;
break;
case GST_VC1_PROFILE_MAIN:
profile = GST_VAAPI_PROFILE_VC1_MAIN;
break;
case GST_VC1_PROFILE_ADVANCED:
profile = GST_VAAPI_PROFILE_VC1_ADVANCED;
break;
default:
g_assert(0 && "XXX: we already validated the profile above");
break;
}
if (priv->profile != profile) {
priv->profile = profile;
priv->profile_changed = TRUE;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_sequence_end(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiDecoderStatus status;
status = decode_current_picture(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
gst_vaapi_dpb_flush(priv->dpb);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_entry_point(GstVaapiDecoderVC1 *decoder, GstVC1BDU *rbdu, GstVC1BDU *ebdu)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1EntryPointHdr * const entrypoint_hdr = &priv->entrypoint_hdr;
GstVC1ParserResult result;
result = gst_vc1_parse_entry_point_header(
rbdu->data + rbdu->offset,
rbdu->size,
entrypoint_hdr,
seq_hdr
);
if (result != GST_VC1_PARSER_OK) {
GST_ERROR("failed to parse entrypoint layer");
return get_status(result);
}
if (entrypoint_hdr->coded_size_flag) {
priv->width = entrypoint_hdr->coded_width;
priv->height = entrypoint_hdr->coded_height;
priv->size_changed = TRUE;
}
priv->has_entrypoint = TRUE;
priv->closed_entry = entrypoint_hdr->closed_entry;
priv->broken_link = entrypoint_hdr->broken_link;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
/* Reconstruct bitstream PTYPE (7.1.1.4, index into Table-35) */
static guint
get_PTYPE(guint ptype)
{
switch (ptype) {
case GST_VC1_PICTURE_TYPE_I: return 0;
case GST_VC1_PICTURE_TYPE_P: return 1;
case GST_VC1_PICTURE_TYPE_B: return 2;
case GST_VC1_PICTURE_TYPE_BI: return 3;
}
return 4; /* skipped P-frame */
}
/* Reconstruct bitstream BFRACTION (7.1.1.14, index into Table-40) */
static guint
get_BFRACTION(guint bfraction)
{
guint i;
static const struct {
guint16 index;
guint16 value;
}
bfraction_map[] = {
{ 0, GST_VC1_BFRACTION_BASIS / 2 },
{ 1, GST_VC1_BFRACTION_BASIS / 3 },
{ 2, (GST_VC1_BFRACTION_BASIS * 2) / 3 },
{ 3, GST_VC1_BFRACTION_BASIS / 4 },
{ 4, (GST_VC1_BFRACTION_BASIS * 3) / 4 },
{ 5, GST_VC1_BFRACTION_BASIS / 5 },
{ 6, (GST_VC1_BFRACTION_BASIS * 2) / 5 },
{ 7, (GST_VC1_BFRACTION_BASIS * 3) / 5 },
{ 8, (GST_VC1_BFRACTION_BASIS * 4) / 5 },
{ 9, GST_VC1_BFRACTION_BASIS / 6 },
{ 10, (GST_VC1_BFRACTION_BASIS * 5) / 6 },
{ 11, GST_VC1_BFRACTION_BASIS / 7 },
{ 12, (GST_VC1_BFRACTION_BASIS * 2) / 7 },
{ 13, (GST_VC1_BFRACTION_BASIS * 3) / 7 },
{ 14, (GST_VC1_BFRACTION_BASIS * 4) / 7 },
{ 15, (GST_VC1_BFRACTION_BASIS * 5) / 7 },
{ 16, (GST_VC1_BFRACTION_BASIS * 6) / 7 },
{ 17, GST_VC1_BFRACTION_BASIS / 8 },
{ 18, (GST_VC1_BFRACTION_BASIS * 3) / 8 },
{ 19, (GST_VC1_BFRACTION_BASIS * 5) / 8 },
{ 20, (GST_VC1_BFRACTION_BASIS * 7) / 8 },
{ 21, GST_VC1_BFRACTION_RESERVED },
{ 22, GST_VC1_BFRACTION_PTYPE_BI }
};
if (!bfraction)
return 0;
for (i = 0; i < G_N_ELEMENTS(bfraction_map); i++) {
if (bfraction_map[i].value == bfraction)
return bfraction_map[i].index;
}
return 21; /* RESERVED */
}
/* Translate GStreamer MV modes to VA-API */
static guint
get_VAMvModeVC1(guint mvmode)
{
switch (mvmode) {
case GST_VC1_MVMODE_1MV_HPEL_BILINEAR: return VAMvMode1MvHalfPelBilinear;
case GST_VC1_MVMODE_1MV: return VAMvMode1Mv;
case GST_VC1_MVMODE_1MV_HPEL: return VAMvMode1MvHalfPel;
case GST_VC1_MVMODE_MIXED_MV: return VAMvModeMixedMv;
case GST_VC1_MVMODE_INTENSITY_COMP: return VAMvModeIntensityCompensation;
}
return 0;
}
/* Reconstruct bitstream MVMODE (7.1.1.32) */
static guint
get_MVMODE(GstVC1FrameHdr *frame_hdr)
{
guint mvmode;
if (frame_hdr->profile == GST_VC1_PROFILE_ADVANCED)
mvmode = frame_hdr->pic.advanced.mvmode;
else
mvmode = frame_hdr->pic.simple.mvmode;
if (frame_hdr->ptype == GST_VC1_PICTURE_TYPE_P ||
frame_hdr->ptype == GST_VC1_PICTURE_TYPE_B)
return get_VAMvModeVC1(mvmode);
return 0;
}
/* Reconstruct bitstream MVMODE2 (7.1.1.33) */
static guint
get_MVMODE2(GstVC1FrameHdr *frame_hdr)
{
guint mvmode, mvmode2;
if (frame_hdr->profile == GST_VC1_PROFILE_ADVANCED) {
mvmode = frame_hdr->pic.advanced.mvmode;
mvmode2 = frame_hdr->pic.advanced.mvmode2;
}
else {
mvmode = frame_hdr->pic.simple.mvmode;
mvmode2 = frame_hdr->pic.simple.mvmode2;
}
if (frame_hdr->ptype == GST_VC1_PICTURE_TYPE_P &&
mvmode == GST_VC1_MVMODE_INTENSITY_COMP)
return get_VAMvModeVC1(mvmode2);
return 0;
}
static inline int
has_MVTYPEMB_bitplane(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
guint mvmode, mvmode2;
if (seq_hdr->profile == GST_VC1_PROFILE_ADVANCED) {
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (pic->mvtypemb)
return 0;
mvmode = pic->mvmode;
mvmode2 = pic->mvmode2;
}
else {
GstVC1PicSimpleMain * const pic = &frame_hdr->pic.simple;
if (pic->mvtypemb)
return 0;
mvmode = pic->mvmode;
mvmode2 = pic->mvmode2;
}
return (frame_hdr->ptype == GST_VC1_PICTURE_TYPE_P &&
(mvmode == GST_VC1_MVMODE_MIXED_MV ||
(mvmode == GST_VC1_MVMODE_INTENSITY_COMP &&
mvmode2 == GST_VC1_MVMODE_MIXED_MV)));
}
static inline int
has_SKIPMB_bitplane(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
if (seq_hdr->profile == GST_VC1_PROFILE_ADVANCED) {
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (pic->skipmb)
return 0;
}
else {
GstVC1PicSimpleMain * const pic = &frame_hdr->pic.simple;
if (pic->skipmb)
return 0;
}
return (frame_hdr->ptype == GST_VC1_PICTURE_TYPE_P ||
frame_hdr->ptype == GST_VC1_PICTURE_TYPE_B);
}
static inline int
has_DIRECTMB_bitplane(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
if (seq_hdr->profile == GST_VC1_PROFILE_ADVANCED) {
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (pic->directmb)
return 0;
}
else {
GstVC1PicSimpleMain * const pic = &frame_hdr->pic.simple;
if (pic->directmb)
return 0;
}
return frame_hdr->ptype == GST_VC1_PICTURE_TYPE_B;
}
static inline int
has_ACPRED_bitplane(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (seq_hdr->profile != GST_VC1_PROFILE_ADVANCED)
return 0;
if (pic->acpred)
return 0;
return (frame_hdr->ptype == GST_VC1_PICTURE_TYPE_I ||
frame_hdr->ptype == GST_VC1_PICTURE_TYPE_BI);
}
static inline int
has_OVERFLAGS_bitplane(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1EntryPointHdr * const entrypoint_hdr = &priv->entrypoint_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (seq_hdr->profile != GST_VC1_PROFILE_ADVANCED)
return 0;
if (pic->overflags)
return 0;
return ((frame_hdr->ptype == GST_VC1_PICTURE_TYPE_I ||
frame_hdr->ptype == GST_VC1_PICTURE_TYPE_BI) &&
(entrypoint_hdr->overlap && frame_hdr->pquant <= 8) &&
pic->condover == GST_VC1_CONDOVER_SELECT);
}
static inline void
pack_bitplanes(GstVaapiBitPlane *bitplane, guint n, const guint8 *bitplanes[3], guint x, guint y, guint stride)
{
const guint dst_index = n / 2;
const guint src_index = y * stride + x;
guint8 v = 0;
if (bitplanes[0])
v |= bitplanes[0][src_index];
if (bitplanes[1])
v |= bitplanes[1][src_index] << 1;
if (bitplanes[2])
v |= bitplanes[2][src_index] << 2;
bitplane->data[dst_index] = (bitplane->data[dst_index] << 4) | v;
}
static gboolean
fill_picture_structc(GstVaapiDecoderVC1 *decoder, GstVaapiPicture *picture)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
VAPictureParameterBufferVC1 * const pic_param = picture->param;
GstVC1SeqStructC * const structc = &priv->seq_hdr.struct_c;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1PicSimpleMain * const pic = &frame_hdr->pic.simple;
/* Fill in VAPictureParameterBufferVC1 (simple/main profile bits) */
pic_param->sequence_fields.bits.finterpflag = structc->finterpflag;
pic_param->sequence_fields.bits.multires = structc->multires;
pic_param->sequence_fields.bits.overlap = structc->overlap;
pic_param->sequence_fields.bits.syncmarker = structc->syncmarker;
pic_param->sequence_fields.bits.rangered = structc->rangered;
pic_param->sequence_fields.bits.max_b_frames = structc->maxbframes;
pic_param->conditional_overlap_flag = 0; /* advanced profile only */
pic_param->fast_uvmc_flag = structc->fastuvmc;
pic_param->b_picture_fraction = get_BFRACTION(pic->bfraction);
pic_param->cbp_table = pic->cbptab;
pic_param->mb_mode_table = 0; /* XXX: interlaced frame */
pic_param->range_reduction_frame = pic->rangeredfrm;
pic_param->rounding_control = 0; /* advanced profile only */
pic_param->post_processing = 0; /* advanced profile only */
pic_param->picture_resolution_index = pic->respic;
pic_param->luma_scale = pic->lumscale;
pic_param->luma_shift = pic->lumshift;
pic_param->raw_coding.flags.mv_type_mb = pic->mvtypemb;
pic_param->raw_coding.flags.direct_mb = pic->directmb;
pic_param->raw_coding.flags.skip_mb = pic->skipmb;
pic_param->bitplane_present.flags.bp_mv_type_mb = has_MVTYPEMB_bitplane(decoder);
pic_param->bitplane_present.flags.bp_direct_mb = has_DIRECTMB_bitplane(decoder);
pic_param->bitplane_present.flags.bp_skip_mb = has_SKIPMB_bitplane(decoder);
pic_param->mv_fields.bits.mv_table = pic->mvtab;
pic_param->mv_fields.bits.extended_mv_flag = structc->extended_mv;
pic_param->mv_fields.bits.extended_mv_range = pic->mvrange;
pic_param->transform_fields.bits.variable_sized_transform_flag = structc->vstransform;
pic_param->transform_fields.bits.mb_level_transform_type_flag = pic->ttmbf;
pic_param->transform_fields.bits.frame_level_transform_type = pic->ttfrm;
pic_param->transform_fields.bits.transform_ac_codingset_idx2 = pic->transacfrm2;
return TRUE;
}
static gboolean
fill_picture_advanced(GstVaapiDecoderVC1 *decoder, GstVaapiPicture *picture)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
VAPictureParameterBufferVC1 * const pic_param = picture->param;
GstVC1AdvancedSeqHdr * const adv_hdr = &priv->seq_hdr.advanced;
GstVC1EntryPointHdr * const entrypoint_hdr = &priv->entrypoint_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1PicAdvanced * const pic = &frame_hdr->pic.advanced;
if (!priv->has_entrypoint)
return FALSE;
/* Fill in VAPictureParameterBufferVC1 (advanced profile bits) */
pic_param->sequence_fields.bits.pulldown = adv_hdr->pulldown;
pic_param->sequence_fields.bits.interlace = adv_hdr->interlace;
pic_param->sequence_fields.bits.tfcntrflag = adv_hdr->tfcntrflag;
pic_param->sequence_fields.bits.finterpflag = adv_hdr->finterpflag;
pic_param->sequence_fields.bits.psf = adv_hdr->psf;
pic_param->sequence_fields.bits.overlap = entrypoint_hdr->overlap;
pic_param->entrypoint_fields.bits.broken_link = entrypoint_hdr->broken_link;
pic_param->entrypoint_fields.bits.closed_entry = entrypoint_hdr->closed_entry;
pic_param->entrypoint_fields.bits.panscan_flag = entrypoint_hdr->panscan_flag;
pic_param->entrypoint_fields.bits.loopfilter = entrypoint_hdr->loopfilter;
pic_param->conditional_overlap_flag = pic->condover;
pic_param->fast_uvmc_flag = entrypoint_hdr->fastuvmc;
pic_param->range_mapping_fields.bits.luma_flag = entrypoint_hdr->range_mapy_flag;
pic_param->range_mapping_fields.bits.luma = entrypoint_hdr->range_mapy;
pic_param->range_mapping_fields.bits.chroma_flag = entrypoint_hdr->range_mapuv_flag;
pic_param->range_mapping_fields.bits.chroma = entrypoint_hdr->range_mapuv;
pic_param->b_picture_fraction = get_BFRACTION(pic->bfraction);
pic_param->cbp_table = pic->cbptab;
pic_param->mb_mode_table = 0; /* XXX: interlaced frame */
pic_param->range_reduction_frame = 0; /* simple/main profile only */
pic_param->rounding_control = pic->rndctrl;
pic_param->post_processing = pic->postproc;
pic_param->picture_resolution_index = 0; /* simple/main profile only */
pic_param->luma_scale = pic->lumscale;
pic_param->luma_shift = pic->lumshift;
pic_param->picture_fields.bits.frame_coding_mode = pic->fcm;
pic_param->picture_fields.bits.top_field_first = pic->tff;
pic_param->picture_fields.bits.is_first_field = pic->fcm == 0; /* XXX: interlaced frame */
pic_param->picture_fields.bits.intensity_compensation = pic->mvmode == GST_VC1_MVMODE_INTENSITY_COMP;
pic_param->raw_coding.flags.mv_type_mb = pic->mvtypemb;
pic_param->raw_coding.flags.direct_mb = pic->directmb;
pic_param->raw_coding.flags.skip_mb = pic->skipmb;
pic_param->raw_coding.flags.ac_pred = pic->acpred;
pic_param->raw_coding.flags.overflags = pic->overflags;
pic_param->bitplane_present.flags.bp_mv_type_mb = has_MVTYPEMB_bitplane(decoder);
pic_param->bitplane_present.flags.bp_direct_mb = has_DIRECTMB_bitplane(decoder);
pic_param->bitplane_present.flags.bp_skip_mb = has_SKIPMB_bitplane(decoder);
pic_param->bitplane_present.flags.bp_ac_pred = has_ACPRED_bitplane(decoder);
pic_param->bitplane_present.flags.bp_overflags = has_OVERFLAGS_bitplane(decoder);
pic_param->reference_fields.bits.reference_distance_flag = entrypoint_hdr->refdist_flag;
pic_param->mv_fields.bits.mv_table = pic->mvtab;
pic_param->mv_fields.bits.extended_mv_flag = entrypoint_hdr->extended_mv;
pic_param->mv_fields.bits.extended_mv_range = pic->mvrange;
pic_param->mv_fields.bits.extended_dmv_flag = entrypoint_hdr->extended_dmv;
pic_param->pic_quantizer_fields.bits.dquant = entrypoint_hdr->dquant;
pic_param->pic_quantizer_fields.bits.quantizer = entrypoint_hdr->quantizer;
pic_param->transform_fields.bits.variable_sized_transform_flag = entrypoint_hdr->vstransform;
pic_param->transform_fields.bits.mb_level_transform_type_flag = pic->ttmbf;
pic_param->transform_fields.bits.frame_level_transform_type = pic->ttfrm;
pic_param->transform_fields.bits.transform_ac_codingset_idx2 = pic->transacfrm2;
return TRUE;
}
static gboolean
fill_picture(GstVaapiDecoderVC1 *decoder, GstVaapiPicture *picture)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
VAPictureParameterBufferVC1 * const pic_param = picture->param;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1VopDquant * const vopdquant = &frame_hdr->vopdquant;
GstVaapiPicture *prev_picture, *next_picture;
/* Fill in VAPictureParameterBufferVC1 (common fields) */
pic_param->forward_reference_picture = VA_INVALID_ID;
pic_param->backward_reference_picture = VA_INVALID_ID;
pic_param->inloop_decoded_picture = VA_INVALID_ID;
pic_param->sequence_fields.value = 0;
#if VA_CHECK_VERSION(0,32,0)
pic_param->sequence_fields.bits.profile = seq_hdr->profile;
#endif
pic_param->coded_width = priv->width;
pic_param->coded_height = priv->height;
pic_param->entrypoint_fields.value = 0;
pic_param->range_mapping_fields.value = 0;
pic_param->picture_fields.value = 0;
pic_param->picture_fields.bits.picture_type = get_PTYPE(frame_hdr->ptype);
pic_param->raw_coding.value = 0;
pic_param->bitplane_present.value = 0;
pic_param->reference_fields.value = 0;
pic_param->mv_fields.value = 0;
pic_param->mv_fields.bits.mv_mode = get_MVMODE(frame_hdr);
pic_param->mv_fields.bits.mv_mode2 = get_MVMODE2(frame_hdr);
pic_param->pic_quantizer_fields.value = 0;
pic_param->pic_quantizer_fields.bits.half_qp = frame_hdr->halfqp;
pic_param->pic_quantizer_fields.bits.pic_quantizer_scale = frame_hdr->pquant;
pic_param->pic_quantizer_fields.bits.pic_quantizer_type = frame_hdr->pquantizer;
pic_param->pic_quantizer_fields.bits.dq_frame = vopdquant->dquantfrm;
pic_param->pic_quantizer_fields.bits.dq_profile = vopdquant->dqprofile;
pic_param->pic_quantizer_fields.bits.dq_sb_edge = vopdquant->dqprofile == GST_VC1_DQPROFILE_SINGLE_EDGE ? vopdquant->dqbedge : 0;
pic_param->pic_quantizer_fields.bits.dq_db_edge = vopdquant->dqprofile == GST_VC1_DQPROFILE_DOUBLE_EDGES ? vopdquant->dqbedge : 0;
pic_param->pic_quantizer_fields.bits.dq_binary_level = vopdquant->dqbilevel;
pic_param->pic_quantizer_fields.bits.alt_pic_quantizer = vopdquant->altpquant;
pic_param->transform_fields.value = 0;
pic_param->transform_fields.bits.transform_ac_codingset_idx1 = frame_hdr->transacfrm;
pic_param->transform_fields.bits.intra_transform_dc_table = frame_hdr->transdctab;
if (seq_hdr->profile == GST_VC1_PROFILE_ADVANCED) {
if (!fill_picture_advanced(decoder, picture))
return FALSE;
}
else {
if (!fill_picture_structc(decoder, picture))
return FALSE;
}
gst_vaapi_dpb_get_neighbours(priv->dpb, picture,
&prev_picture, &next_picture);
switch (picture->type) {
case GST_VAAPI_PICTURE_TYPE_B:
if (next_picture)
pic_param->backward_reference_picture = next_picture->surface_id;
if (prev_picture)
pic_param->forward_reference_picture = prev_picture->surface_id;
else if (!priv->closed_entry)
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_SKIPPED);
break;
case GST_VAAPI_PICTURE_TYPE_P:
if (prev_picture)
pic_param->forward_reference_picture = prev_picture->surface_id;
break;
default:
break;
}
if (pic_param->bitplane_present.value) {
const guint8 *bitplanes[3];
guint x, y, n;
switch (picture->type) {
case GST_VAAPI_PICTURE_TYPE_P:
bitplanes[0] = pic_param->bitplane_present.flags.bp_direct_mb ? priv->bitplanes->directmb : NULL;
bitplanes[1] = pic_param->bitplane_present.flags.bp_skip_mb ? priv->bitplanes->skipmb : NULL;
bitplanes[2] = pic_param->bitplane_present.flags.bp_mv_type_mb ? priv->bitplanes->mvtypemb : NULL;
break;
case GST_VAAPI_PICTURE_TYPE_B:
bitplanes[0] = pic_param->bitplane_present.flags.bp_direct_mb ? priv->bitplanes->directmb : NULL;
bitplanes[1] = pic_param->bitplane_present.flags.bp_skip_mb ? priv->bitplanes->skipmb : NULL;
bitplanes[2] = NULL; /* XXX: interlaced frame (FORWARD plane) */
break;
case GST_VAAPI_PICTURE_TYPE_BI:
case GST_VAAPI_PICTURE_TYPE_I:
bitplanes[0] = NULL; /* XXX: interlaced frame (FIELDTX plane) */
bitplanes[1] = pic_param->bitplane_present.flags.bp_ac_pred ? priv->bitplanes->acpred : NULL;
bitplanes[2] = pic_param->bitplane_present.flags.bp_overflags ? priv->bitplanes->overflags : NULL;
break;
default:
bitplanes[0] = NULL;
bitplanes[1] = NULL;
bitplanes[2] = NULL;
break;
}
picture->bitplane = GST_VAAPI_BITPLANE_NEW(
decoder,
(seq_hdr->mb_width * seq_hdr->mb_height + 1) / 2
);
if (!picture->bitplane)
return FALSE;
n = 0;
for (y = 0; y < seq_hdr->mb_height; y++)
for (x = 0; x < seq_hdr->mb_width; x++, n++)
pack_bitplanes(picture->bitplane, n, bitplanes, x, y, seq_hdr->mb_stride);
if (n & 1) /* move last nibble to the high order */
picture->bitplane->data[n/2] <<= 4;
}
return TRUE;
}
static GstVaapiDecoderStatus
decode_slice_chunk(GstVaapiDecoderVC1 *decoder, GstVC1BDU *ebdu,
guint slice_addr, guint header_size)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiPicture * const picture = priv->current_picture;
GstVaapiSlice *slice;
VASliceParameterBufferVC1 *slice_param;
slice = GST_VAAPI_SLICE_NEW(VC1, decoder,
ebdu->data + ebdu->sc_offset,
ebdu->size + ebdu->offset - ebdu->sc_offset);
if (!slice) {
GST_ERROR("failed to allocate slice");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
gst_vaapi_picture_add_slice(picture, slice);
/* Fill in VASliceParameterBufferVC1 */
slice_param = slice->param;
slice_param->macroblock_offset = 8 * (ebdu->offset - ebdu->sc_offset) +
header_size;
slice_param->slice_vertical_position = slice_addr;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_frame(GstVaapiDecoderVC1 *decoder, GstVC1BDU *rbdu, GstVC1BDU *ebdu)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1FrameHdr * const frame_hdr = &priv->frame_hdr;
GstVC1ParserResult result;
GstVaapiPicture * const picture = priv->current_picture;
memset(frame_hdr, 0, sizeof(*frame_hdr));
result = gst_vc1_parse_frame_header(
rbdu->data + rbdu->offset,
rbdu->size,
frame_hdr,
&priv->seq_hdr,
priv->bitplanes
);
if (result != GST_VC1_PARSER_OK) {
GST_ERROR("failed to parse frame layer");
return get_status(result);
}
switch (frame_hdr->ptype) {
case GST_VC1_PICTURE_TYPE_I:
picture->type = GST_VAAPI_PICTURE_TYPE_I;
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_REFERENCE);
break;
case GST_VC1_PICTURE_TYPE_SKIPPED:
case GST_VC1_PICTURE_TYPE_P:
picture->type = GST_VAAPI_PICTURE_TYPE_P;
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_REFERENCE);
break;
case GST_VC1_PICTURE_TYPE_B:
picture->type = GST_VAAPI_PICTURE_TYPE_B;
break;
case GST_VC1_PICTURE_TYPE_BI:
picture->type = GST_VAAPI_PICTURE_TYPE_BI;
break;
default:
GST_ERROR("unsupported picture type %d", frame_hdr->ptype);
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
/* Update presentation time */
if (GST_VAAPI_PICTURE_IS_REFERENCE(picture)) {
picture->poc = priv->last_non_b_picture ?
(priv->last_non_b_picture->poc + 1) : priv->next_poc;
priv->next_poc = picture->poc + 1;
gst_vaapi_picture_replace(&priv->last_non_b_picture, picture);
}
else if (!priv->last_non_b_picture)
picture->poc = priv->next_poc++;
else { /* B or BI */
picture->poc = priv->last_non_b_picture->poc++;
priv->next_poc = priv->last_non_b_picture->poc + 1;
}
picture->pts = GST_VAAPI_DECODER_CODEC_FRAME(decoder)->pts;
if (!fill_picture(decoder, picture))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
return decode_slice_chunk(decoder, ebdu, 0, frame_hdr->header_size);
}
static GstVaapiDecoderStatus
decode_slice(GstVaapiDecoderVC1 *decoder, GstVC1BDU *rbdu, GstVC1BDU *ebdu)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SliceHdr slice_hdr;
GstVC1ParserResult result;
memset(&slice_hdr, 0, sizeof(slice_hdr));
result = gst_vc1_parse_slice_header(
rbdu->data + rbdu->offset,
rbdu->size,
&slice_hdr,
&priv->seq_hdr
);
if (result != GST_VC1_PARSER_OK) {
GST_ERROR("failed to parse slice layer");
return get_status(result);
}
return decode_slice_chunk(decoder, ebdu, slice_hdr.slice_addr,
slice_hdr.header_size);
}
static gboolean
decode_rbdu(GstVaapiDecoderVC1 *decoder, GstVC1BDU *rbdu, GstVC1BDU *ebdu)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
guint8 *rbdu_buffer;
guint i, j, rbdu_buffer_size;
/* BDU are encapsulated in advanced profile mode only */
if (priv->profile != GST_VAAPI_PROFILE_VC1_ADVANCED) {
memcpy(rbdu, ebdu, sizeof(*rbdu));
return TRUE;
}
/* Reallocate unescaped bitstream buffer */
rbdu_buffer = priv->rbdu_buffer;
if (!rbdu_buffer || ebdu->size > priv->rbdu_buffer_size) {
rbdu_buffer = g_realloc(priv->rbdu_buffer, ebdu->size);
if (!rbdu_buffer)
return FALSE;
priv->rbdu_buffer = rbdu_buffer;
priv->rbdu_buffer_size = ebdu->size;
}
/* Unescape bitstream buffer */
if (ebdu->size < 4) {
memcpy(rbdu_buffer, ebdu->data + ebdu->offset, ebdu->size);
rbdu_buffer_size = ebdu->size;
}
else {
guint8 * const bdu_buffer = ebdu->data + ebdu->offset;
for (i = 0, j = 0; i < ebdu->size; i++) {
if (i >= 2 && i < ebdu->size - 1 &&
bdu_buffer[i - 1] == 0x00 &&
bdu_buffer[i - 2] == 0x00 &&
bdu_buffer[i ] == 0x03 &&
bdu_buffer[i + 1] <= 0x03)
i++;
rbdu_buffer[j++] = bdu_buffer[i];
}
rbdu_buffer_size = j;
}
/* Reconstruct RBDU */
rbdu->type = ebdu->type;
rbdu->size = rbdu_buffer_size;
rbdu->sc_offset = 0;
rbdu->offset = 0;
rbdu->data = rbdu_buffer;
return TRUE;
}
static GstVaapiDecoderStatus
decode_ebdu(GstVaapiDecoderVC1 *decoder, GstVC1BDU *ebdu)
{
GstVaapiDecoderStatus status;
GstVC1BDU rbdu;
if (!decode_rbdu(decoder, &rbdu, ebdu))
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
switch (ebdu->type) {
case GST_VC1_SEQUENCE:
status = decode_sequence(decoder, &rbdu, ebdu);
break;
case GST_VC1_ENTRYPOINT:
status = decode_entry_point(decoder, &rbdu, ebdu);
break;
case GST_VC1_FRAME:
status = decode_frame(decoder, &rbdu, ebdu);
break;
case GST_VC1_SLICE:
status = decode_slice(decoder, &rbdu, ebdu);
break;
case GST_VC1_END_OF_SEQ:
status = decode_sequence_end(decoder);
break;
default:
GST_WARNING("unsupported BDU type %d", ebdu->type);
status = GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
break;
}
return status;
}
static GstVaapiDecoderStatus
decode_buffer(GstVaapiDecoderVC1 *decoder, guchar *buf, guint buf_size)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1BDU ebdu;
if (priv->has_codec_data) {
ebdu.type = GST_VC1_FRAME;
ebdu.sc_offset = 0;
ebdu.offset = 0;
}
else {
ebdu.type = buf[3];
ebdu.sc_offset = 0;
ebdu.offset = 4;
}
ebdu.data = buf;
ebdu.size = buf_size - ebdu.offset;
return decode_ebdu(decoder, &ebdu);
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_vc1_decode_codec_data(GstVaapiDecoder *base_decoder,
const guchar *buf, guint buf_size)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVC1SeqHdr * const seq_hdr = &priv->seq_hdr;
GstVaapiDecoderStatus status;
GstVC1ParserResult result;
GstVC1BDU ebdu;
GstCaps *caps;
GstStructure *structure;
guint ofs;
gint width, height;
guint32 format;
gint version;
priv->has_codec_data = TRUE;
width = GST_VAAPI_DECODER_WIDTH(decoder);
height = GST_VAAPI_DECODER_HEIGHT(decoder);
if (!width || !height) {
GST_ERROR("failed to parse size from codec-data");
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
caps = GST_VAAPI_DECODER_CODEC_STATE(decoder)->caps;
structure = gst_caps_get_structure(caps, 0);
if (!gst_structure_get_fourcc(structure, "format", &format)) {
/* Try to determine format from "wmvversion" property */
if (gst_structure_get_int(structure, "wmvversion", &version))
format = (version >= 1 && version <= 3) ?
GST_MAKE_FOURCC('W','M','V',('0'+version)) : 0;
else
format = 0;
}
if (!format) {
GST_ERROR("failed to parse profile from codec-data");
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC;
}
/* WMV3 -- expecting sequence header */
if (format == GST_MAKE_FOURCC('W','M','V','3')) {
seq_hdr->struct_c.coded_width = width;
seq_hdr->struct_c.coded_height = height;
ebdu.type = GST_VC1_SEQUENCE;
ebdu.size = buf_size;
ebdu.sc_offset = 0;
ebdu.offset = 0;
ebdu.data = (guint8 *)buf;
return decode_ebdu(decoder, &ebdu);
}
/* WVC1 -- expecting bitstream data units */
if (format != GST_MAKE_FOURCC('W','V','C','1'))
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
seq_hdr->advanced.max_coded_width = width;
seq_hdr->advanced.max_coded_height = height;
ofs = 0;
do {
result = gst_vc1_identify_next_bdu(
buf + ofs,
buf_size - ofs,
&ebdu
);
switch (result) {
case GST_VC1_PARSER_NO_BDU_END:
/* Assume the EBDU is complete within codec-data bounds */
ebdu.size = buf_size - ofs - ebdu.offset;
// fall-through
case GST_VC1_PARSER_OK:
status = decode_ebdu(decoder, &ebdu);
ofs += ebdu.offset + ebdu.size;
break;
default:
status = get_status(result);
break;
}
} while (status == GST_VAAPI_DECODER_STATUS_SUCCESS && ofs < buf_size);
return status;
}
static GstVaapiDecoderStatus
ensure_decoder(GstVaapiDecoderVC1 *decoder)
{
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiDecoderStatus status;
if (!priv->is_opened) {
priv->is_opened = gst_vaapi_decoder_vc1_open(decoder);
if (!priv->is_opened)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC;
status = gst_vaapi_decoder_decode_codec_data(
GST_VAAPI_DECODER_CAST(decoder));
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
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
gst_vaapi_decoder_vc1_parse(GstVaapiDecoder *base_decoder,
GstAdapter *adapter, gboolean at_eos, GstVaapiDecoderUnit *unit)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiDecoderStatus status;
guint8 bdu_type;
guint size, buf_size, flags = 0;
gint ofs;
status = ensure_decoder(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
size = gst_adapter_available(adapter);
if (priv->has_codec_data) {
// Assume demuxer sends out plain frames
if (size < 1)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
buf_size = size;
bdu_type = GST_VC1_FRAME;
}
else {
if (size < 4)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
ofs = scan_for_start_code(adapter, 0, size, NULL);
if (ofs < 0)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
gst_adapter_flush(adapter, ofs);
size -= ofs;
ofs = G_UNLIKELY(size < 8) ? -1 :
scan_for_start_code(adapter, 4, size - 4, NULL);
if (ofs < 0) {
// Assume the whole packet is present if end-of-stream
if (!at_eos)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
ofs = size;
}
buf_size = ofs;
gst_adapter_copy(adapter, &bdu_type, 3, 1);
}
unit->size = buf_size;
/* Check for new picture layer */
switch (bdu_type) {
case GST_VC1_END_OF_SEQ:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_FRAME_END;
flags |= GST_VAAPI_DECODER_UNIT_FLAG_STREAM_END;
break;
case GST_VC1_SEQUENCE:
case GST_VC1_ENTRYPOINT:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_FRAME_START;
break;
case GST_VC1_FRAME:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_FRAME_START;
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
break;
case GST_VC1_SLICE:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
break;
}
GST_VAAPI_DECODER_UNIT_FLAG_SET(unit, flags);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_vc1_decode(GstVaapiDecoder *base_decoder,
GstVaapiDecoderUnit *unit)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderStatus status;
GstBuffer * const buffer =
GST_VAAPI_DECODER_CODEC_FRAME(decoder)->input_buffer;
GstMapInfo map_info;
status = ensure_decoder(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
if (!gst_buffer_map(buffer, &map_info, GST_MAP_READ)) {
GST_ERROR("failed to map buffer");
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
status = decode_buffer(decoder, map_info.data + unit->offset, unit->size);
gst_buffer_unmap(buffer, &map_info);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_vc1_start_frame(GstVaapiDecoder *base_decoder,
GstVaapiDecoderUnit *unit)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
GstVaapiDecoderStatus status;
GstVaapiPicture *picture;
status = ensure_context(decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
GST_ERROR("failed to reset context");
return status;
}
picture = GST_VAAPI_PICTURE_NEW(VC1, 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);
/* Update cropping rectangle */
do {
GstVC1AdvancedSeqHdr *adv_hdr;
GstVaapiRectangle crop_rect;
if (priv->profile != GST_VAAPI_PROFILE_VC1_ADVANCED)
break;
adv_hdr = &priv->seq_hdr.advanced;
if (!adv_hdr->display_ext)
break;
crop_rect.x = 0;
crop_rect.y = 0;
crop_rect.width = adv_hdr->disp_horiz_size;
crop_rect.height = adv_hdr->disp_vert_size;
if (crop_rect.width <= priv->width && crop_rect.height <= priv->height)
gst_vaapi_picture_set_crop_rect(picture, &crop_rect);
} while (0);
if (!gst_vc1_bitplanes_ensure_size(priv->bitplanes, &priv->seq_hdr)) {
GST_ERROR("failed to allocate bitplanes");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_vc1_end_frame(GstVaapiDecoder *base_decoder)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
return decode_current_picture(decoder);
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_vc1_flush(GstVaapiDecoder *base_decoder)
{
GstVaapiDecoderVC1 * const decoder =
GST_VAAPI_DECODER_VC1_CAST(base_decoder);
GstVaapiDecoderVC1Private * const priv = &decoder->priv;
gst_vaapi_dpb_flush(priv->dpb);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static void
gst_vaapi_decoder_vc1_class_init(GstVaapiDecoderVC1Class *klass)
{
GstVaapiMiniObjectClass * const object_class =
GST_VAAPI_MINI_OBJECT_CLASS(klass);
GstVaapiDecoderClass * const decoder_class = GST_VAAPI_DECODER_CLASS(klass);
object_class->size = sizeof(GstVaapiDecoderVC1);
object_class->finalize = (GDestroyNotify)gst_vaapi_decoder_finalize;
decoder_class->create = gst_vaapi_decoder_vc1_create;
decoder_class->destroy = gst_vaapi_decoder_vc1_destroy;
decoder_class->parse = gst_vaapi_decoder_vc1_parse;
decoder_class->decode = gst_vaapi_decoder_vc1_decode;
decoder_class->start_frame = gst_vaapi_decoder_vc1_start_frame;
decoder_class->end_frame = gst_vaapi_decoder_vc1_end_frame;
decoder_class->flush = gst_vaapi_decoder_vc1_flush;
decoder_class->decode_codec_data =
gst_vaapi_decoder_vc1_decode_codec_data;
}
static inline const GstVaapiDecoderClass *
gst_vaapi_decoder_vc1_class(void)
{
static GstVaapiDecoderVC1Class g_class;
static gsize g_class_init = FALSE;
if (g_once_init_enter(&g_class_init)) {
gst_vaapi_decoder_vc1_class_init(&g_class);
g_once_init_leave(&g_class_init, TRUE);
}
return GST_VAAPI_DECODER_CLASS(&g_class);
}
/**
* gst_vaapi_decoder_vc1_new:
* @display: a #GstVaapiDisplay
* @caps: a #GstCaps holding codec information
*
* Creates a new #GstVaapiDecoder for VC-1 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_vc1_new(GstVaapiDisplay *display, GstCaps *caps)
{
return gst_vaapi_decoder_new(gst_vaapi_decoder_vc1_class(), display, caps);
}
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