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lavc: Move start code finding to utils.c

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This allows dropping the mpegvideo dependency from a number of
components.

This also fixes standalone building of the h264 parser, which
was broken in 64e438697.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-03-25 12:42:57 +02:00
parent 613a37eca4
commit 75644335b9
3 changed files with 36 additions and 36 deletions
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5
configure vendored
View File

@ -1514,7 +1514,7 @@ atrac1_decoder_select="mdct sinewin"
atrac3_decoder_select="mdct"
binkaudio_dct_decoder_select="mdct rdft dct sinewin"
binkaudio_rdft_decoder_select="mdct rdft sinewin"
cavs_decoder_select="golomb h264chroma mpegvideo videodsp"
cavs_decoder_select="golomb h264chroma videodsp"
comfortnoise_encoder_select="lpc"
cook_decoder_select="mdct sinewin"
cscd_decoder_select="lzo"
@ -1752,13 +1752,12 @@ mov_demuxer_suggest="zlib"
mov_muxer_select="rtpenc_chain"
mp3_demuxer_select="mpegaudio_parser"
mp4_muxer_select="mov_muxer"
mpegts_muxer_select="adts_muxer latm_muxer mpegvideo"
mpegts_muxer_select="adts_muxer latm_muxer"
mpegtsraw_demuxer_select="mpegts_demuxer"
mxf_d10_muxer_select="mxf_muxer"
ogg_demuxer_select="golomb"
psp_muxer_select="mov_muxer"
rtp_demuxer_select="sdp_demuxer"
rtp_muxer_select="mpegvideo"
rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
rtsp_demuxer_select="http_protocol rtpdec"
rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"

33
libavcodec/mpegvideo.c
View File

@ -158,39 +158,6 @@ static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
ff_MPV_decode_mb(s, s->block);
}
const uint8_t *avpriv_mpv_find_start_code(const uint8_t *restrict p,
const uint8_t *end,
uint32_t * restrict state)
{
int i;
assert(p <= end);
if (p >= end)
return end;
for (i = 0; i < 3; i++) {
uint32_t tmp = *state << 8;
*state = tmp + *(p++);
if (tmp == 0x100 || p == end)
return p;
}
while (p < end) {
if (p[-1] > 1 ) p += 3;
else if (p[-2] ) p += 2;
else if (p[-3]|(p[-1]-1)) p++;
else {
p++;
break;
}
}
p = FFMIN(p, end) - 4;
*state = AV_RB32(p);
return p + 4;
}
/* init common dct for both encoder and decoder */
av_cold int ff_dct_common_init(MpegEncContext *s)
{

34
libavcodec/utils.c
View File

@ -39,6 +39,7 @@
#include "avcodec.h"
#include "dsputil.h"
#include "libavutil/opt.h"
#include "mpegvideo.h"
#include "thread.h"
#include "internal.h"
#include "bytestream.h"
@ -2197,3 +2198,36 @@ int avcodec_is_open(AVCodecContext *s)
{
return !!s->internal;
}
const uint8_t *avpriv_mpv_find_start_code(const uint8_t *restrict p,
const uint8_t *end,
uint32_t * restrict state)
{
int i;
assert(p <= end);
if (p >= end)
return end;
for (i = 0; i < 3; i++) {
uint32_t tmp = *state << 8;
*state = tmp + *(p++);
if (tmp == 0x100 || p == end)
return p;
}
while (p < end) {
if (p[-1] > 1 ) p += 3;
else if (p[-2] ) p += 2;
else if (p[-3]|(p[-1]-1)) p++;
else {
p++;
break;
}
}
p = FFMIN(p, end) - 4;
*state = AV_RB32(p);
return p + 4;
}