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lavf/mlpdec: Simplify mlp/thd probe function.

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Move the demuxers into their own file.
This commit is contained in:
Carl Eugen Hoyos 2015-10-03 22:40:27 +02:00
parent e306e43633
commit 32a6d37a6b
3 changed files with 87 additions and 62 deletions
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4
libavformat/Makefile
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@ -251,7 +251,7 @@ OBJS-$(CONFIG_MICRODVD_DEMUXER) += microdvddec.o subtitles.o
OBJS-$(CONFIG_MICRODVD_MUXER) += microdvdenc.o
OBJS-$(CONFIG_MJPEG_DEMUXER) += rawdec.o
OBJS-$(CONFIG_MJPEG_MUXER) += rawenc.o
OBJS-$(CONFIG_MLP_DEMUXER) += rawdec.o
OBJS-$(CONFIG_MLP_DEMUXER) += rawdec.o mlpdec.o
OBJS-$(CONFIG_MLP_MUXER) += rawenc.o
OBJS-$(CONFIG_MLV_DEMUXER) += mlvdec.o riffdec.o
OBJS-$(CONFIG_MM_DEMUXER) += mm.o
@ -434,7 +434,7 @@ OBJS-$(CONFIG_THP_DEMUXER) += thp.o
OBJS-$(CONFIG_TIERTEXSEQ_DEMUXER) += tiertexseq.o
OBJS-$(CONFIG_MKVTIMESTAMP_V2_MUXER) += mkvtimestamp_v2.o
OBJS-$(CONFIG_TMV_DEMUXER) += tmv.o
OBJS-$(CONFIG_TRUEHD_DEMUXER) += rawdec.o
OBJS-$(CONFIG_TRUEHD_DEMUXER) += rawdec.o mlpdec.o
OBJS-$(CONFIG_TRUEHD_MUXER) += rawenc.o
OBJS-$(CONFIG_TTA_DEMUXER) += tta.o apetag.o img2.o
OBJS-$(CONFIG_TTY_DEMUXER) += tty.o sauce.o

85
libavformat/mlpdec.c Normal file
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@ -0,0 +1,85 @@
/*
* MLP and TrueHD demuxer
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2005 Alex Beregszaszi
* Copyright (c) 2015 Carl Eugen Hoyos
*
* 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
*/
#include "avformat.h"
#include "rawdec.h"
#include "libavutil/intreadwrite.h"
static int av_always_inline mlp_thd_probe(AVProbeData *p, uint32_t sync)
{
const uint8_t *buf, *last_buf = p->buf, *end = p->buf + p->buf_size;
int frames = 0, valid = 0, size = 0;
for (buf = p->buf; buf + 8 <= end; buf++) {
if (AV_RB32(buf + 4) == sync) {
frames++;
if (last_buf + size == buf) {
valid++;
}
last_buf = buf;
size = (AV_RB16(buf) & 0xfff) * 2;
} else if (buf - last_buf == size) {
size += (AV_RB16(buf) & 0xfff) * 2;
}
}
if (valid >= 100)
return AVPROBE_SCORE_MAX;
return 0;
}
#if CONFIG_MLP_DEMUXER
static int mlp_probe(AVProbeData *p)
{
return mlp_thd_probe(p, 0xf8726fbb);
}
AVInputFormat ff_mlp_demuxer = {
.name = "mlp",
.long_name = NULL_IF_CONFIG_SMALL("raw MLP"),
.read_probe = mlp_probe,
.read_header = ff_raw_audio_read_header,
.read_packet = ff_raw_read_partial_packet,
.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS,
.extensions = "mlp",
.raw_codec_id = AV_CODEC_ID_MLP,
};
#endif
#if CONFIG_TRUEHD_DEMUXER
static int thd_probe(AVProbeData *p)
{
return mlp_thd_probe(p, 0xf8726fba);
}
AVInputFormat ff_truehd_demuxer = {
.name = "truehd",
.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"),
.read_probe = thd_probe,
.read_header = ff_raw_audio_read_header,
.read_packet = ff_raw_read_partial_packet,
.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS,
.extensions = "thd",
.raw_codec_id = AV_CODEC_ID_TRUEHD,
};
#endif

60
libavformat/rawdec.c
View File

@ -206,66 +206,6 @@ static int mjpeg_probe(AVProbeData *p)
FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
#endif
#if CONFIG_MLP_DEMUXER || CONFIG_TRUEHD_DEMUXER
static int av_always_inline mlp_thd_probe(AVProbeData *p, uint32_t sync)
{
const uint8_t *buf, *last_buf = p->buf, *end = p->buf + p->buf_size;
int frames = 0, valid = 0, size = 0;
for (buf = p->buf; buf + 8 <= end; buf++) {
if (AV_RB32(buf + 4) == sync) {
frames++;
if (last_buf + size == buf) {
valid++;
}
last_buf = buf;
size = (AV_RB16(buf) & 0xfff) * 2;
} else if (buf - last_buf == size) {
size += (AV_RB16(buf) & 0xfff) * 2;
}
}
if (valid >= 100)
return AVPROBE_SCORE_MAX;
return 0;
}
#endif
#if CONFIG_MLP_DEMUXER
static int mlp_probe(AVProbeData *p)
{
return mlp_thd_probe(p, 0xf8726fbb);
}
AVInputFormat ff_mlp_demuxer = {
.name = "mlp",
.long_name = NULL_IF_CONFIG_SMALL("raw MLP"),
.read_probe = mlp_probe,
.read_header = ff_raw_audio_read_header,
.read_packet = ff_raw_read_partial_packet,
.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS,
.extensions = "mlp",
.raw_codec_id = AV_CODEC_ID_MLP,
};
#endif
#if CONFIG_TRUEHD_DEMUXER
static int thd_probe(AVProbeData *p)
{
return mlp_thd_probe(p, 0xf8726fba);
}
AVInputFormat ff_truehd_demuxer = {
.name = "truehd",
.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"),
.read_probe = thd_probe,
.read_header = ff_raw_audio_read_header,
.read_packet = ff_raw_read_partial_packet,
.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS,
.extensions = "thd",
.raw_codec_id = AV_CODEC_ID_TRUEHD,
};
#endif
#if CONFIG_VC1_DEMUXER
FF_DEF_RAWVIDEO_DEMUXER2(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
#endif