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mpeg4videodec: move mpeg4-specific post-frame-decode code from h264dec to mpeg4videodec

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This commit is contained in:
Anton Khirnov 2013-11-26 14:22:10 +01:00
parent b452d5ae86
commit e2ceb17642
3 changed files with 46 additions and 33 deletions
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35
libavcodec/h263dec.c
View File

@ -593,40 +593,9 @@ int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
assert(s->bitstream_buffer_size == 0);
/* divx 5.01+ bistream reorder stuff */
if (s->codec_id == AV_CODEC_ID_MPEG4 && s->divx_packed) {
int current_pos = get_bits_count(&s->gb) >> 3;
int startcode_found = 0;
if (buf_size - current_pos > 5) {
int i;
for (i = current_pos; i < buf_size - 3; i++)
if (buf[i] == 0 &&
buf[i + 1] == 0 &&
buf[i + 2] == 1 &&
buf[i + 3] == 0xB6) {
startcode_found = 1;
break;
}
}
if (s->gb.buffer == s->bitstream_buffer && buf_size > 7 &&
s->xvid_build >= 0) { // xvid style
startcode_found = 1;
current_pos = 0;
}
if (startcode_found) {
av_fast_malloc(&s->bitstream_buffer,
&s->allocated_bitstream_buffer_size,
buf_size - current_pos +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->bitstream_buffer)
return AVERROR(ENOMEM);
memcpy(s->bitstream_buffer, buf + current_pos,
buf_size - current_pos);
s->bitstream_buffer_size = buf_size - current_pos;
}
}
if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
ff_mpeg4_frame_end(avctx, buf, buf_size);
intrax8_decoded:
ff_er_frame_end(&s->er);

1
libavcodec/mpeg4video.h
View File

@ -118,6 +118,7 @@ int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx);
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx);
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
/**
*

43
libavcodec/mpeg4videodec.c
View File

@ -2492,6 +2492,49 @@ end:
return decode_vop_header(ctx, gb);
}
int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
{
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext *s = &ctx->m;
/* divx 5.01+ bistream reorder stuff */
if (s->divx_packed) {
int current_pos = get_bits_count(&s->gb) >> 3;
int startcode_found = 0;
if (buf_size - current_pos > 5) {
int i;
for (i = current_pos; i < buf_size - 3; i++)
if (buf[i] == 0 &&
buf[i + 1] == 0 &&
buf[i + 2] == 1 &&
buf[i + 3] == 0xB6) {
startcode_found = 1;
break;
}
}
if (s->gb.buffer == s->bitstream_buffer && buf_size > 7 &&
s->xvid_build >= 0) { // xvid style
startcode_found = 1;
current_pos = 0;
}
if (startcode_found) {
av_fast_malloc(&s->bitstream_buffer,
&s->allocated_bitstream_buffer_size,
buf_size - current_pos +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->bitstream_buffer)
return AVERROR(ENOMEM);
memcpy(s->bitstream_buffer, buf + current_pos,
buf_size - current_pos);
s->bitstream_buffer_size = buf_size - current_pos;
}
}
return 0;
}
static int mpeg4_update_thread_context(AVCodecContext *dst,
const AVCodecContext *src)
{