virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-28 20:53:54 +02:00
Code Issues Releases Activity
12794ff1e4
FFmpeg/libavcodec/h263dec.c
Stefan Schoenefeld a12e40e021 avcodec/h263dec: fix hwaccel decoding 
Recently we encountered an issue when decoding a h.263 file:

FFmpeg will freeze when decoding h.263 video with NVDEC. Turns out this is not directly related to NVDEC but is a problem that shows with several other HW decoders like VDPAU, though the exact kind of error is different (either error messages or freezing[1]). The root cause is that ff_thread_finish_setup() is called twice per frame from ff_h263_decode_frame(). This is not supported by ff_thread_finish_setup() and specifically checked for and warned against in the functions code. The issue is also specific to hw accelerated decoding only as the second call to ff_thread_finish_setup() is only issued when hw acceleration is on. The fix is simple: add a check that the first call is only send when hw acceleration is off, and the second call only when hw acceleration is on (see attached patch). This works fine as far as I was able to test with vdpau and nvdec/nvcuvid hw decoding. The patch also adds NVDEC to the hw config list if available.

I also noticed a secondary issue when browsing through the code which is that, according to documentation, ff_thread_finish_setup() should only be called if the codec implements update_thread_context(), which h263dec does not. The patch does not address this and I'm not sure any action needs to be taken here at all.

[1] This is depending on whether or not the hw decoder sets the  HWACCEL_CAPS_ASYNC_SAFE flag

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
2019-08-04 16:21:11 +02:00

791 lines
26 KiB
C
Raw Blame History

/*
* H.263 decoder
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* H.263 decoder.
*/
#define UNCHECKED_BITSTREAM_READER 1
#include "libavutil/cpu.h"
#include "avcodec.h"
#include "error_resilience.h"
#include "flv.h"
#include "h263.h"
#include "h263_parser.h"
#include "hwaccel.h"
#include "internal.h"
#include "mpeg_er.h"
#include "mpeg4video.h"
#include "mpeg4video_parser.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "msmpeg4.h"
#include "qpeldsp.h"
#include "thread.h"
#include "wmv2.h"
static enum AVPixelFormat h263_get_format(AVCodecContext *avctx)
{
/* MPEG-4 Studio Profile only, not supported by hardware */
if (avctx->bits_per_raw_sample > 8) {
av_assert1(((MpegEncContext *)avctx->priv_data)->studio_profile);
return avctx->pix_fmt;
}
if (avctx->codec->id == AV_CODEC_ID_MSS2)
return AV_PIX_FMT_YUV420P;
if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
avctx->color_range = AVCOL_RANGE_MPEG;
return AV_PIX_FMT_GRAY8;
}
return avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
}
av_cold int ff_h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int ret;
s->out_format = FMT_H263;
// set defaults
ff_mpv_decode_defaults(s);
ff_mpv_decode_init(s, avctx);
s->quant_precision = 5;
s->decode_mb = ff_h263_decode_mb;
s->low_delay = 1;
s->unrestricted_mv = 1;
/* select sub codec */
switch (avctx->codec->id) {
case AV_CODEC_ID_H263:
case AV_CODEC_ID_H263P:
s->unrestricted_mv = 0;
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
break;
case AV_CODEC_ID_MPEG4:
break;
case AV_CODEC_ID_MSMPEG4V1:
s->h263_pred = 1;
s->msmpeg4_version = 1;
break;
case AV_CODEC_ID_MSMPEG4V2:
s->h263_pred = 1;
s->msmpeg4_version = 2;
break;
case AV_CODEC_ID_MSMPEG4V3:
s->h263_pred = 1;
s->msmpeg4_version = 3;
break;
case AV_CODEC_ID_WMV1:
s->h263_pred = 1;
s->msmpeg4_version = 4;
break;
case AV_CODEC_ID_WMV2:
s->h263_pred = 1;
s->msmpeg4_version = 5;
break;
case AV_CODEC_ID_VC1:
case AV_CODEC_ID_WMV3:
case AV_CODEC_ID_VC1IMAGE:
case AV_CODEC_ID_WMV3IMAGE:
case AV_CODEC_ID_MSS2:
s->h263_pred = 1;
s->msmpeg4_version = 6;
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
break;
case AV_CODEC_ID_H263I:
break;
case AV_CODEC_ID_FLV1:
s->h263_flv = 1;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n",
avctx->codec->id);
return AVERROR(ENOSYS);
}
s->codec_id = avctx->codec->id;
if (avctx->codec_tag == AV_RL32("L263") || avctx->codec_tag == AV_RL32("S263"))
if (avctx->extradata_size == 56 && avctx->extradata[0] == 1)
s->ehc_mode = 1;
/* for H.263, we allocate the images after having read the header */
if (avctx->codec->id != AV_CODEC_ID_H263 &&
avctx->codec->id != AV_CODEC_ID_H263P &&
avctx->codec->id != AV_CODEC_ID_MPEG4) {
avctx->pix_fmt = h263_get_format(avctx);
ff_mpv_idct_init(s);
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
}
ff_h263dsp_init(&s->h263dsp);
ff_qpeldsp_init(&s->qdsp);
ff_h263_decode_init_vlc();
return 0;
}
av_cold int ff_h263_decode_end(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
ff_mpv_common_end(s);
return 0;
}
/**
* Return the number of bytes consumed for building the current frame.
*/
static int get_consumed_bytes(MpegEncContext *s, int buf_size)
{
int pos = (get_bits_count(&s->gb) + 7) >> 3;
if (s->divx_packed || s->avctx->hwaccel) {
/* We would have to scan through the whole buf to handle the weird
* reordering ... */
return buf_size;
} else if (s->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
pos -= s->parse_context.last_index;
// padding is not really read so this might be -1
if (pos < 0)
pos = 0;
return pos;
} else {
// avoid infinite loops (maybe not needed...)
if (pos == 0)
pos = 1;
// oops ;)
if (pos + 10 > buf_size)
pos = buf_size;
return pos;
}
}
static int decode_slice(MpegEncContext *s)
{
const int part_mask = s->partitioned_frame
? (ER_AC_END | ER_AC_ERROR) : 0x7F;
const int mb_size = 16 >> s->avctx->lowres;
int ret;
s->last_resync_gb = s->gb;
s->first_slice_line = 1;
s->resync_mb_x = s->mb_x;
s->resync_mb_y = s->mb_y;
ff_set_qscale(s, s->qscale);
if (s->studio_profile) {
if ((ret = ff_mpeg4_decode_studio_slice_header(s->avctx->priv_data)) < 0)
return ret;
}
if (s->avctx->hwaccel) {
const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
// ensure we exit decode loop
s->mb_y = s->mb_height;
return ret;
}
if (s->partitioned_frame) {
const int qscale = s->qscale;
if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
return ret;
/* restore variables which were modified */
s->first_slice_line = 1;
s->mb_x = s->resync_mb_x;
s->mb_y = s->resync_mb_y;
ff_set_qscale(s, qscale);
}
for (; s->mb_y < s->mb_height; s->mb_y++) {
/* per-row end of slice checks */
if (s->msmpeg4_version) {
if (s->resync_mb_y + s->slice_height == s->mb_y) {
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
s->mb_x - 1, s->mb_y, ER_MB_END);
return 0;
}
}
if (s->msmpeg4_version == 1) {
s->last_dc[0] =
s->last_dc[1] =
s->last_dc[2] = 128;
}
ff_init_block_index(s);
for (; s->mb_x < s->mb_width; s->mb_x++) {
int ret;
ff_update_block_index(s);
if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
s->first_slice_line = 0;
/* DCT & quantize */
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
ff_dlog(s, "%d %06X\n",
get_bits_count(&s->gb), show_bits(&s->gb, 24));
ff_tlog(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
ret = s->decode_mb(s, s->block);
if (s->pict_type != AV_PICTURE_TYPE_B)
ff_h263_update_motion_val(s);
if (ret < 0) {
const int xy = s->mb_x + s->mb_y * s->mb_stride;
if (ret == SLICE_END) {
ff_mpv_reconstruct_mb(s, s->block);
if (s->loop_filter)
ff_h263_loop_filter(s);
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
s->mb_x, s->mb_y, ER_MB_END & part_mask);
s->padding_bug_score--;
if (++s->mb_x >= s->mb_width) {
s->mb_x = 0;
ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
ff_mpv_report_decode_progress(s);
s->mb_y++;
}
return 0;
} else if (ret == SLICE_NOEND) {
av_log(s->avctx, AV_LOG_ERROR,
"Slice mismatch at MB: %d\n", xy);
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
s->mb_x + 1, s->mb_y,
ER_MB_END & part_mask);
return AVERROR_INVALIDDATA;
}
av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
if (s->avctx->err_recognition & AV_EF_IGNORE_ERR)
continue;
return AVERROR_INVALIDDATA;
}
ff_mpv_reconstruct_mb(s, s->block);
if (s->loop_filter)
ff_h263_loop_filter(s);
}
ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
ff_mpv_report_decode_progress(s);
s->mb_x = 0;
}
av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
// Detect incorrect padding with wrong stuffing codes used by NEC N-02B
if (s->codec_id == AV_CODEC_ID_MPEG4 &&
(s->workaround_bugs & FF_BUG_AUTODETECT) &&
get_bits_left(&s->gb) >= 48 &&
show_bits(&s->gb, 24) == 0x4010 &&
!s->data_partitioning)
s->padding_bug_score += 32;
/* try to detect the padding bug */
if (s->codec_id == AV_CODEC_ID_MPEG4 &&
(s->workaround_bugs & FF_BUG_AUTODETECT) &&
get_bits_left(&s->gb) >= 0 &&
get_bits_left(&s->gb) < 137 &&
!s->data_partitioning) {
const int bits_count = get_bits_count(&s->gb);
const int bits_left = s->gb.size_in_bits - bits_count;
if (bits_left == 0) {
s->padding_bug_score += 16;
} else if (bits_left != 1) {
int v = show_bits(&s->gb, 8);
v |= 0x7F >> (7 - (bits_count & 7));
if (v == 0x7F && bits_left <= 8)
s->padding_bug_score--;
else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
bits_left <= 16)
s->padding_bug_score += 4;
else
s->padding_bug_score++;
}
}
if (s->codec_id == AV_CODEC_ID_H263 &&
(s->workaround_bugs & FF_BUG_AUTODETECT) &&
get_bits_left(&s->gb) >= 8 &&
get_bits_left(&s->gb) < 300 &&
s->pict_type == AV_PICTURE_TYPE_I &&
show_bits(&s->gb, 8) == 0 &&
!s->data_partitioning) {
s->padding_bug_score += 32;
}
if (s->codec_id == AV_CODEC_ID_H263 &&
(s->workaround_bugs & FF_BUG_AUTODETECT) &&
get_bits_left(&s->gb) >= 64 &&
AV_RB64(s->gb.buffer_end - 8) == 0xCDCDCDCDFC7F0000) {
s->padding_bug_score += 32;
}
if (s->workaround_bugs & FF_BUG_AUTODETECT) {
if (
(s->padding_bug_score > -2 && !s->data_partitioning))
s->workaround_bugs |= FF_BUG_NO_PADDING;
else
s->workaround_bugs &= ~FF_BUG_NO_PADDING;
}
// handle formats which don't have unique end markers
if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
int left = get_bits_left(&s->gb);
int max_extra = 7;
/* no markers in M$ crap */
if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
max_extra += 17;
/* buggy padding but the frame should still end approximately at
* the bitstream end */
if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
(s->avctx->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
max_extra += 48;
else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
max_extra += 256 * 256 * 256 * 64;
if (left > max_extra)
av_log(s->avctx, AV_LOG_ERROR,
"discarding %d junk bits at end, next would be %X\n",
left, show_bits(&s->gb, 24));
else if (left < 0)
av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
else
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
s->mb_x - 1, s->mb_y, ER_MB_END);
return 0;
}
av_log(s->avctx, AV_LOG_ERROR,
"slice end not reached but screenspace end (%d left %06X, score= %d)\n",
get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
ER_MB_END & part_mask);
return AVERROR_INVALIDDATA;
}
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
MpegEncContext *s = avctx->priv_data;
int ret;
int slice_ret = 0;
AVFrame *pict = data;
/* no supplementary picture */
if (buf_size == 0) {
/* special case for last picture */
if (s->low_delay == 0 && s->next_picture_ptr) {
if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
return ret;
s->next_picture_ptr = NULL;
*got_frame = 1;
}
return 0;
}
if (s->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
int next;
if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
} else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
} else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
} else {
av_log(s->avctx, AV_LOG_ERROR,
"this codec does not support truncated bitstreams\n");
return AVERROR(ENOSYS);
}
if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
&buf_size) < 0)
return buf_size;
}
retry:
if (s->divx_packed && s->bitstream_buffer_size) {
int i;
for(i=0; i < buf_size-3; i++) {
if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
if (buf[i+3]==0xB0) {
av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
s->bitstream_buffer_size = 0;
}
break;
}
}
}
if (s->bitstream_buffer_size && (s->divx_packed || buf_size <= MAX_NVOP_SIZE)) // divx 5.01+/xvid frame reorder
ret = init_get_bits8(&s->gb, s->bitstream_buffer,
s->bitstream_buffer_size);
else
ret = init_get_bits8(&s->gb, buf, buf_size);
s->bitstream_buffer_size = 0;
if (ret < 0)
return ret;
if (!s->context_initialized)
// we need the idct permutation for reading a custom matrix
ff_mpv_idct_init(s);
/* let's go :-) */
if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
ret = ff_wmv2_decode_picture_header(s);
} else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
ret = ff_msmpeg4_decode_picture_header(s);
} else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
if (s->avctx->extradata_size && s->picture_number == 0) {
GetBitContext gb;
if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
ff_mpeg4_decode_picture_header(avctx->priv_data, &gb);
}
ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb);
} else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
ret = ff_intel_h263_decode_picture_header(s);
} else if (CONFIG_FLV_DECODER && s->h263_flv) {
ret = ff_flv_decode_picture_header(s);
} else {
ret = ff_h263_decode_picture_header(s);
}
if (ret < 0 || ret == FRAME_SKIPPED) {
if ( s->width != avctx->coded_width
|| s->height != avctx->coded_height) {
av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
s->width = avctx->coded_width;
s->height= avctx->coded_height;
}
}
if (ret == FRAME_SKIPPED)
return get_consumed_bytes(s, buf_size);
/* skip if the header was thrashed */
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
return ret;
}
if (!s->context_initialized) {
avctx->pix_fmt = h263_get_format(avctx);
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
}
if (!s->current_picture_ptr || s->current_picture_ptr->f->data[0]) {
int i = ff_find_unused_picture(s->avctx, s->picture, 0);
if (i < 0)
return i;
s->current_picture_ptr = &s->picture[i];
}
avctx->has_b_frames = !s->low_delay;
if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
if (ff_mpeg4_workaround_bugs(avctx) == 1)
goto retry;
if (s->studio_profile != (s->idsp.idct == NULL))
ff_mpv_idct_init(s);
}
/* After H.263 & MPEG-4 header decode we have the height, width,
* and other parameters. So then we could init the picture.
* FIXME: By the way H.263 decoder is evolving it should have
* an H263EncContext */
if (s->width != avctx->coded_width ||
s->height != avctx->coded_height ||
s->context_reinit) {
/* H.263 could change picture size any time */
s->context_reinit = 0;
ret = ff_set_dimensions(avctx, s->width, s->height);
if (ret < 0)
return ret;
ff_set_sar(avctx, avctx->sample_aspect_ratio);
if ((ret = ff_mpv_common_frame_size_change(s)))
return ret;
if (avctx->pix_fmt != h263_get_format(avctx)) {
av_log(avctx, AV_LOG_ERROR, "format change not supported\n");
avctx->pix_fmt = AV_PIX_FMT_NONE;
return AVERROR_UNKNOWN;
}
}
if (s->codec_id == AV_CODEC_ID_H263 ||
s->codec_id == AV_CODEC_ID_H263P ||
s->codec_id == AV_CODEC_ID_H263I)
s->gob_index = H263_GOB_HEIGHT(s->height);
// for skipping the frame
s->current_picture.f->pict_type = s->pict_type;
s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
/* skip B-frames if we don't have reference frames */
if (!s->last_picture_ptr &&
(s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
return get_consumed_bytes(s, buf_size);
if ((avctx->skip_frame >= AVDISCARD_NONREF &&
s->pict_type == AV_PICTURE_TYPE_B) ||
(avctx->skip_frame >= AVDISCARD_NONKEY &&
s->pict_type != AV_PICTURE_TYPE_I) ||
avctx->skip_frame >= AVDISCARD_ALL)
return get_consumed_bytes(s, buf_size);
if (s->next_p_frame_damaged) {
if (s->pict_type == AV_PICTURE_TYPE_B)
return get_consumed_bytes(s, buf_size);
else
s->next_p_frame_damaged = 0;
}
if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
} else {
s->me.qpel_put = s->qdsp.put_no_rnd_qpel_pixels_tab;
s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
}
if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
return ret;
if (!s->divx_packed && !avctx->hwaccel)
ff_thread_finish_setup(avctx);
if (avctx->hwaccel) {
ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
s->gb.buffer_end - s->gb.buffer);
if (ret < 0 )
return ret;
}
ff_mpeg_er_frame_start(s);
/* the second part of the wmv2 header contains the MB skip bits which
* are stored in current_picture->mb_type which is not available before
* ff_mpv_frame_start() */
if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
ret = ff_wmv2_decode_secondary_picture_header(s);
if (ret < 0)
return ret;
if (ret == 1)
goto frame_end;
}
/* decode each macroblock */
s->mb_x = 0;
s->mb_y = 0;
slice_ret = decode_slice(s);
while (s->mb_y < s->mb_height) {
if (s->msmpeg4_version) {
if (s->slice_height == 0 || s->mb_x != 0 || slice_ret < 0 ||
(s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
break;
} else {
int prev_x = s->mb_x, prev_y = s->mb_y;
if (ff_h263_resync(s) < 0)
break;
if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
s->er.error_occurred = 1;
}
if (s->msmpeg4_version < 4 && s->h263_pred)
ff_mpeg4_clean_buffers(s);
if (decode_slice(s) < 0)
slice_ret = AVERROR_INVALIDDATA;
}
if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
s->pict_type == AV_PICTURE_TYPE_I)
if (!CONFIG_MSMPEG4_DECODER ||
ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
av_assert1(s->bitstream_buffer_size == 0);
frame_end:
if (!s->studio_profile)
ff_er_frame_end(&s->er);
if (avctx->hwaccel) {
ret = avctx->hwaccel->end_frame(avctx);
if (ret < 0)
return ret;
}
ff_mpv_frame_end(s);
if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
ff_mpeg4_frame_end(avctx, buf, buf_size);
if (!s->divx_packed && avctx->hwaccel)
ff_thread_finish_setup(avctx);
av_assert1(s->current_picture.f->pict_type == s->current_picture_ptr->f->pict_type);
av_assert1(s->current_picture.f->pict_type == s->pict_type);
if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
return ret;
ff_print_debug_info(s, s->current_picture_ptr, pict);
ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
} else if (s->last_picture_ptr) {
if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
return ret;
ff_print_debug_info(s, s->last_picture_ptr, pict);
ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
}
if (s->last_picture_ptr || s->low_delay) {
if ( pict->format == AV_PIX_FMT_YUV420P
&& (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
int x, y, p;
av_frame_make_writable(pict);
for (p=0; p<3; p++) {
int w = AV_CEIL_RSHIFT(pict-> width, !!p);
int h = AV_CEIL_RSHIFT(pict->height, !!p);
int linesize = pict->linesize[p];
for (y=0; y<(h>>1); y++)
for (x=0; x<w; x++)
FFSWAP(int,
pict->data[p][x + y*linesize],
pict->data[p][x + (h-1-y)*linesize]);
}
}
*got_frame = 1;
}
if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
return slice_ret;
else
return get_consumed_bytes(s, buf_size);
}
const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = {
#if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL
AV_PIX_FMT_VAAPI,
#endif
#if CONFIG_MPEG4_NVDEC_HWACCEL
AV_PIX_FMT_CUDA,
#endif
#if CONFIG_MPEG4_VDPAU_HWACCEL
AV_PIX_FMT_VDPAU,
#endif
#if CONFIG_H263_VIDEOTOOLBOX_HWACCEL || CONFIG_MPEG4_VIDEOTOOLBOX_HWACCEL
AV_PIX_FMT_VIDEOTOOLBOX,
#endif
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE
};
AVCodec ff_h263_decoder = {
.name = "h263",
.long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H263,
.priv_data_size = sizeof(MpegEncContext),
.init = ff_h263_decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.flush = ff_mpeg_flush,
.max_lowres = 3,
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
};
AVCodec ff_h263p_decoder = {
.name = "h263p",
.long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H263P,
.priv_data_size = sizeof(MpegEncContext),
.init = ff_h263_decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.flush = ff_mpeg_flush,
.max_lowres = 3,
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
.hw_configs = (const AVCodecHWConfigInternal*[]) {
#if CONFIG_H263_VAAPI_HWACCEL
HWACCEL_VAAPI(h263),
#endif
#if CONFIG_MPEG4_VDPAU_HWACCEL
HWACCEL_VDPAU(mpeg4),
#endif
#if CONFIG_H263_VIDEOTOOLBOX_HWACCEL
HWACCEL_VIDEOTOOLBOX(h263),
#endif
NULL
},
};
Reference in New Issue View Git Blame Copy Permalink