Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Branch: stable
Fetching contributors…

Cannot retrieve contributors at this time

409 lines (339 sloc) 11.82 kB
/*
* R3D REDCODE demuxer
* Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* 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/dict.h"
#include "libavutil/mathematics.h"
#include "avformat.h"
#include "internal.h"
typedef struct R3DContext {
unsigned video_offsets_count;
unsigned *video_offsets;
unsigned rdvo_offset;
} R3DContext;
typedef struct Atom {
unsigned size;
uint32_t tag;
uint64_t offset;
} Atom;
static int read_atom(AVFormatContext *s, Atom *atom)
{
atom->offset = avio_tell(s->pb);
atom->size = avio_rb32(s->pb);
if (atom->size < 8)
return -1;
atom->tag = avio_rl32(s->pb);
av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
atom->size, (char*)&atom->tag, atom->offset);
return atom->size;
}
static int r3d_read_red1(AVFormatContext *s)
{
AVStream *st = avformat_new_stream(s, NULL);
char filename[258];
int tmp;
int av_unused tmp2;
AVRational framerate;
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_JPEG2000;
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
tmp = avio_rb32(s->pb);
avpriv_set_pts_info(st, 32, 1, tmp);
tmp = avio_rb32(s->pb); // filenum
av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
avio_skip(s->pb, 32); // unknown
st->codec->width = avio_rb32(s->pb);
st->codec->height = avio_rb32(s->pb);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
framerate.num = avio_rb16(s->pb);
framerate.den = avio_rb16(s->pb);
if (framerate.num > 0 && framerate.den > 0) {
#if FF_API_R_FRAME_RATE
st->r_frame_rate =
#endif
st->avg_frame_rate = framerate;
}
tmp = avio_r8(s->pb); // audio channels
av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
if (tmp > 0) {
AVStream *ast = avformat_new_stream(s, NULL);
if (!ast)
return AVERROR(ENOMEM);
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
ast->codec->channels = tmp;
avpriv_set_pts_info(ast, 32, 1, st->time_base.den);
}
avio_read(s->pb, filename, 257);
filename[sizeof(filename)-1] = 0;
av_dict_set(&st->metadata, "filename", filename, 0);
av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codec->width, st->codec->height);
av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
framerate.num, framerate.den);
return 0;
}
static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
{
R3DContext *r3d = s->priv_data;
AVStream *st = s->streams[0];
int i;
r3d->video_offsets_count = (atom->size - 8) / 4;
r3d->video_offsets = av_malloc(atom->size);
if (!r3d->video_offsets)
return AVERROR(ENOMEM);
for (i = 0; i < r3d->video_offsets_count; i++) {
r3d->video_offsets[i] = avio_rb32(s->pb);
if (!r3d->video_offsets[i]) {
r3d->video_offsets_count = i;
break;
}
av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
}
if (st->avg_frame_rate.num)
st->duration = av_rescale_q(r3d->video_offsets_count,
av_inv_q(st->avg_frame_rate),
st->time_base);
av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
return 0;
}
static void r3d_read_reos(AVFormatContext *s)
{
R3DContext *r3d = s->priv_data;
int av_unused tmp;
r3d->rdvo_offset = avio_rb32(s->pb);
avio_rb32(s->pb); // rdvs offset
avio_rb32(s->pb); // rdao offset
avio_rb32(s->pb); // rdas offset
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
avio_skip(s->pb, 6*4);
}
static int r3d_read_header(AVFormatContext *s)
{
R3DContext *r3d = s->priv_data;
Atom atom;
int ret;
if (read_atom(s, &atom) < 0) {
av_log(s, AV_LOG_ERROR, "error reading atom\n");
return -1;
}
if (atom.tag == MKTAG('R','E','D','1')) {
if ((ret = r3d_read_red1(s)) < 0) {
av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
return ret;
}
} else {
av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
return -1;
}
s->internal->data_offset = avio_tell(s->pb);
av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
if (!s->pb->seekable)
return 0;
// find REOB/REOF/REOS to load index
avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading end atom\n");
if (atom.tag != MKTAG('R','E','O','B') &&
atom.tag != MKTAG('R','E','O','F') &&
atom.tag != MKTAG('R','E','O','S'))
goto out;
r3d_read_reos(s);
if (r3d->rdvo_offset) {
avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
if (atom.tag == MKTAG('R','D','V','O')) {
if (r3d_read_rdvo(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
}
}
out:
avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
return 0;
}
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
AVStream *st = s->streams[0];
int tmp;
int av_unused tmp2;
int64_t pos = avio_tell(s->pb);
unsigned dts;
int ret;
dts = avio_rb32(s->pb);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
if (tmp > 4) {
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
}
tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
if (tmp < 0)
return -1;
ret = av_get_packet(s->pb, pkt, tmp);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "error reading video packet\n");
return -1;
}
pkt->stream_index = 0;
pkt->dts = dts;
if (st->avg_frame_rate.num)
pkt->duration = (uint64_t)st->time_base.den*
st->avg_frame_rate.den/st->avg_frame_rate.num;
av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration);
return 0;
}
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
AVStream *st = s->streams[1];
int av_unused tmp, tmp2;
int samples, size;
int64_t pos = avio_tell(s->pb);
unsigned dts;
int ret;
dts = avio_rb32(s->pb);
st->codec->sample_rate = avio_rb32(s->pb);
if (st->codec->sample_rate <= 0) {
av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
return AVERROR_INVALIDDATA;
}
samples = avio_rb32(s->pb);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb32(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
size = atom->size - 8 - (avio_tell(s->pb) - pos);
if (size < 0)
return -1;
ret = av_get_packet(s->pb, pkt, size);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
return ret;
}
pkt->stream_index = 1;
pkt->dts = dts;
if (st->codec->sample_rate)
pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n",
pkt->dts, pkt->duration, samples, st->codec->sample_rate);
return 0;
}
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
{
Atom atom;
int err = 0;
while (!err) {
if (read_atom(s, &atom) < 0) {
err = -1;
break;
}
switch (atom.tag) {
case MKTAG('R','E','D','V'):
if (s->streams[0]->discard == AVDISCARD_ALL)
goto skip;
if (!(err = r3d_read_redv(s, pkt, &atom)))
return 0;
break;
case MKTAG('R','E','D','A'):
if (s->nb_streams < 2)
return -1;
if (s->streams[1]->discard == AVDISCARD_ALL)
goto skip;
if (!(err = r3d_read_reda(s, pkt, &atom)))
return 0;
break;
default:
skip:
avio_skip(s->pb, atom.size-8);
}
}
return err;
}
static int r3d_probe(AVProbeData *p)
{
if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
return AVPROBE_SCORE_MAX;
return 0;
}
static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
AVStream *st = s->streams[0]; // video stream
R3DContext *r3d = s->priv_data;
int frame_num;
if (!st->avg_frame_rate.num)
return -1;
frame_num = av_rescale_q(sample_time, st->time_base,
av_inv_q(st->avg_frame_rate));
av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
frame_num, sample_time);
if (frame_num < r3d->video_offsets_count) {
if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
return -1;
} else {
av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
return -1;
}
return 0;
}
static int r3d_close(AVFormatContext *s)
{
R3DContext *r3d = s->priv_data;
av_freep(&r3d->video_offsets);
return 0;
}
AVInputFormat ff_r3d_demuxer = {
.name = "r3d",
.long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
.priv_data_size = sizeof(R3DContext),
.read_probe = r3d_probe,
.read_header = r3d_read_header,
.read_packet = r3d_read_packet,
.read_close = r3d_close,
.read_seek = r3d_seek,
};
Jump to Line
Something went wrong with that request. Please try again.