mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-10-03 03:30:45 +00:00
976a8b2179
* qatar/master: (40 commits) H.264: template left MB handling H.264: faster fill_decode_caches H.264: faster write_back_* H.264: faster fill_filter_caches H.264: make filter_mb_fast support the case of unavailable top mb Do not include log.h in avutil.h Do not include pixfmt.h in avutil.h Do not include rational.h in avutil.h Do not include mathematics.h in avutil.h Do not include intfloat_readwrite.h in avutil.h Remove return statements following infinite loops without break RTSP: Doxygen comment cleanup doxygen: Escape '\' in Doxygen documentation. md5: cosmetics md5: use AV_WL32 to write result md5: add fate test md5: include correct headers md5: fix test program doxygen: Drop array size declarations from Doxygen parameter names. doxygen: Fix parameter names to match the function prototypes. ... Conflicts: libavcodec/x86/dsputil_mmx.c libavformat/flvenc.c libavformat/oggenc.c libavformat/wtv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
272 lines
9.0 KiB
C
272 lines
9.0 KiB
C
/*
|
|
* NuppelVideo demuxer.
|
|
* Copyright (c) 2006 Reimar Doeffinger
|
|
*
|
|
* 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 "libavutil/intreadwrite.h"
|
|
#include "libavutil/intfloat_readwrite.h"
|
|
#include "avformat.h"
|
|
#include "riff.h"
|
|
|
|
typedef struct {
|
|
int v_id;
|
|
int a_id;
|
|
int rtjpg_video;
|
|
} NUVContext;
|
|
|
|
typedef enum {
|
|
NUV_VIDEO = 'V',
|
|
NUV_EXTRADATA = 'D',
|
|
NUV_AUDIO = 'A',
|
|
NUV_SEEKP = 'R',
|
|
NUV_MYTHEXT = 'X'
|
|
} nuv_frametype;
|
|
|
|
static int nuv_probe(AVProbeData *p) {
|
|
if (!memcmp(p->buf, "NuppelVideo", 12))
|
|
return AVPROBE_SCORE_MAX;
|
|
if (!memcmp(p->buf, "MythTVVideo", 12))
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
//! little macro to sanitize packet size
|
|
#define PKTSIZE(s) (s & 0xffffff)
|
|
|
|
/**
|
|
* @brief read until we found all data needed for decoding
|
|
* @param vst video stream of which to change parameters
|
|
* @param ast video stream of which to change parameters
|
|
* @param myth set if this is a MythTVVideo format file
|
|
* @return 1 if all required codec data was found
|
|
*/
|
|
static int get_codec_data(AVIOContext *pb, AVStream *vst,
|
|
AVStream *ast, int myth) {
|
|
nuv_frametype frametype;
|
|
if (!vst && !myth)
|
|
return 1; // no codec data needed
|
|
while (!url_feof(pb)) {
|
|
int size, subtype;
|
|
frametype = avio_r8(pb);
|
|
switch (frametype) {
|
|
case NUV_EXTRADATA:
|
|
subtype = avio_r8(pb);
|
|
avio_skip(pb, 6);
|
|
size = PKTSIZE(avio_rl32(pb));
|
|
if (vst && subtype == 'R') {
|
|
vst->codec->extradata_size = size;
|
|
vst->codec->extradata = av_malloc(size);
|
|
avio_read(pb, vst->codec->extradata, size);
|
|
size = 0;
|
|
if (!myth)
|
|
return 1;
|
|
}
|
|
break;
|
|
case NUV_MYTHEXT:
|
|
avio_skip(pb, 7);
|
|
size = PKTSIZE(avio_rl32(pb));
|
|
if (size != 128 * 4)
|
|
break;
|
|
avio_rl32(pb); // version
|
|
if (vst) {
|
|
vst->codec->codec_tag = avio_rl32(pb);
|
|
vst->codec->codec_id =
|
|
ff_codec_get_id(ff_codec_bmp_tags, vst->codec->codec_tag);
|
|
if (vst->codec->codec_tag == MKTAG('R', 'J', 'P', 'G'))
|
|
vst->codec->codec_id = CODEC_ID_NUV;
|
|
} else
|
|
avio_skip(pb, 4);
|
|
|
|
if (ast) {
|
|
ast->codec->codec_tag = avio_rl32(pb);
|
|
ast->codec->sample_rate = avio_rl32(pb);
|
|
ast->codec->bits_per_coded_sample = avio_rl32(pb);
|
|
ast->codec->channels = avio_rl32(pb);
|
|
ast->codec->codec_id =
|
|
ff_wav_codec_get_id(ast->codec->codec_tag,
|
|
ast->codec->bits_per_coded_sample);
|
|
ast->need_parsing = AVSTREAM_PARSE_FULL;
|
|
} else
|
|
avio_skip(pb, 4 * 4);
|
|
|
|
size -= 6 * 4;
|
|
avio_skip(pb, size);
|
|
return 1;
|
|
case NUV_SEEKP:
|
|
size = 11;
|
|
break;
|
|
default:
|
|
avio_skip(pb, 7);
|
|
size = PKTSIZE(avio_rl32(pb));
|
|
break;
|
|
}
|
|
avio_skip(pb, size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
|
|
NUVContext *ctx = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
char id_string[12];
|
|
double aspect, fps;
|
|
int is_mythtv, width, height, v_packs, a_packs;
|
|
int stream_nr = 0;
|
|
AVStream *vst = NULL, *ast = NULL;
|
|
avio_read(pb, id_string, 12);
|
|
is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
|
|
avio_skip(pb, 5); // version string
|
|
avio_skip(pb, 3); // padding
|
|
width = avio_rl32(pb);
|
|
height = avio_rl32(pb);
|
|
avio_rl32(pb); // unused, "desiredwidth"
|
|
avio_rl32(pb); // unused, "desiredheight"
|
|
avio_r8(pb); // 'P' == progressive, 'I' == interlaced
|
|
avio_skip(pb, 3); // padding
|
|
aspect = av_int2dbl(avio_rl64(pb));
|
|
if (aspect > 0.9999 && aspect < 1.0001)
|
|
aspect = 4.0 / 3.0;
|
|
fps = av_int2dbl(avio_rl64(pb));
|
|
|
|
// number of packets per stream type, -1 means unknown, e.g. streaming
|
|
v_packs = avio_rl32(pb);
|
|
a_packs = avio_rl32(pb);
|
|
avio_rl32(pb); // text
|
|
|
|
avio_rl32(pb); // keyframe distance (?)
|
|
|
|
if (v_packs) {
|
|
ctx->v_id = stream_nr++;
|
|
vst = av_new_stream(s, ctx->v_id);
|
|
if (!vst)
|
|
return AVERROR(ENOMEM);
|
|
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->codec->codec_id = CODEC_ID_NUV;
|
|
vst->codec->width = width;
|
|
vst->codec->height = height;
|
|
vst->codec->bits_per_coded_sample = 10;
|
|
vst->sample_aspect_ratio = av_d2q(aspect * height / width, 10000);
|
|
vst->r_frame_rate = av_d2q(fps, 60000);
|
|
av_set_pts_info(vst, 32, 1, 1000);
|
|
} else
|
|
ctx->v_id = -1;
|
|
|
|
if (a_packs) {
|
|
ctx->a_id = stream_nr++;
|
|
ast = av_new_stream(s, ctx->a_id);
|
|
if (!ast)
|
|
return AVERROR(ENOMEM);
|
|
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
ast->codec->codec_id = CODEC_ID_PCM_S16LE;
|
|
ast->codec->channels = 2;
|
|
ast->codec->sample_rate = 44100;
|
|
ast->codec->bit_rate = 2 * 2 * 44100 * 8;
|
|
ast->codec->block_align = 2 * 2;
|
|
ast->codec->bits_per_coded_sample = 16;
|
|
av_set_pts_info(ast, 32, 1, 1000);
|
|
} else
|
|
ctx->a_id = -1;
|
|
|
|
get_codec_data(pb, vst, ast, is_mythtv);
|
|
ctx->rtjpg_video = vst && vst->codec->codec_id == CODEC_ID_NUV;
|
|
return 0;
|
|
}
|
|
|
|
#define HDRSIZE 12
|
|
|
|
static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
|
|
NUVContext *ctx = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint8_t hdr[HDRSIZE];
|
|
nuv_frametype frametype;
|
|
int ret, size;
|
|
while (!url_feof(pb)) {
|
|
int copyhdrsize = ctx->rtjpg_video ? HDRSIZE : 0;
|
|
uint64_t pos = avio_tell(pb);
|
|
ret = avio_read(pb, hdr, HDRSIZE);
|
|
if (ret < HDRSIZE)
|
|
return ret < 0 ? ret : AVERROR(EIO);
|
|
frametype = hdr[0];
|
|
size = PKTSIZE(AV_RL32(&hdr[8]));
|
|
switch (frametype) {
|
|
case NUV_EXTRADATA:
|
|
if (!ctx->rtjpg_video) {
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
case NUV_VIDEO:
|
|
if (ctx->v_id < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
ret = av_new_packet(pkt, copyhdrsize + size);
|
|
if (ret < 0)
|
|
return ret;
|
|
// HACK: we have no idea if it is a keyframe,
|
|
// but if we mark none seeking will not work at all.
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
pkt->pos = pos;
|
|
pkt->pts = AV_RL32(&hdr[4]);
|
|
pkt->stream_index = ctx->v_id;
|
|
memcpy(pkt->data, hdr, copyhdrsize);
|
|
ret = avio_read(pb, pkt->data + copyhdrsize, size);
|
|
if (ret < 0) {
|
|
av_free_packet(pkt);
|
|
return ret;
|
|
}
|
|
if (ret < size)
|
|
av_shrink_packet(pkt, copyhdrsize + ret);
|
|
return 0;
|
|
case NUV_AUDIO:
|
|
if (ctx->a_id < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
ret = av_get_packet(pb, pkt, size);
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
pkt->pos = pos;
|
|
pkt->pts = AV_RL32(&hdr[4]);
|
|
pkt->stream_index = ctx->a_id;
|
|
if (ret < 0) return ret;
|
|
return 0;
|
|
case NUV_SEEKP:
|
|
// contains no data, size value is invalid
|
|
break;
|
|
default:
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
}
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
AVInputFormat ff_nuv_demuxer = {
|
|
"nuv",
|
|
NULL_IF_CONFIG_SMALL("NuppelVideo format"),
|
|
sizeof(NUVContext),
|
|
nuv_probe,
|
|
nuv_header,
|
|
nuv_packet,
|
|
NULL,
|
|
NULL,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|