mirror of
https://git.videolan.org/git/ffmpeg.git
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![Stefano Sabatini](/assets/img/avatar_default.png)
in its place. av_metadata_set() is going to be dropped at the next major bump. Originally committed as revision 22961 to svn://svn.ffmpeg.org/ffmpeg/trunk
390 lines
10 KiB
C
390 lines
10 KiB
C
/*
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* R3D REDCODE demuxer
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* Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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//#define DEBUG
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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typedef struct {
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unsigned video_offsets_count;
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unsigned *video_offsets;
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unsigned rdvo_offset;
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} R3DContext;
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typedef struct {
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unsigned size;
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uint32_t tag;
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uint64_t offset;
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} Atom;
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static int read_atom(AVFormatContext *s, Atom *atom)
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{
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atom->offset = url_ftell(s->pb);
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atom->size = get_be32(s->pb);
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if (atom->size < 8)
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return -1;
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atom->tag = get_le32(s->pb);
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dprintf(s, "atom %d %.4s offset %#llx\n",
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atom->size, (char*)&atom->tag, atom->offset);
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return atom->size;
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}
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static int r3d_read_red1(AVFormatContext *s)
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{
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AVStream *st = av_new_stream(s, 0);
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char filename[258];
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int tmp, tmp2;
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_JPEG2000;
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tmp = get_byte(s->pb); // major version
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tmp2 = get_byte(s->pb); // minor version
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dprintf(s, "version %d.%d\n", tmp, tmp2);
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tmp = get_be16(s->pb); // unknown
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dprintf(s, "unknown1 %d\n", tmp);
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tmp = get_be32(s->pb);
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av_set_pts_info(st, 32, 1, tmp);
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tmp = get_be32(s->pb); // filenum
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dprintf(s, "filenum %d\n", tmp);
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url_fskip(s->pb, 32); // unknown
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st->codec->width = get_be32(s->pb);
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st->codec->height = get_be32(s->pb);
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tmp = get_be16(s->pb); // unknown
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dprintf(s, "unknown2 %d\n", tmp);
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st->codec->time_base.den = get_be16(s->pb);
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st->codec->time_base.num = get_be16(s->pb);
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tmp = get_byte(s->pb); // audio channels
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dprintf(s, "audio channels %d\n", tmp);
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if (tmp > 0) {
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AVStream *ast = av_new_stream(s, 1);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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ast->codec->codec_id = CODEC_ID_PCM_S32BE;
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ast->codec->channels = tmp;
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av_set_pts_info(ast, 32, 1, st->time_base.den);
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}
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get_buffer(s->pb, filename, 257);
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filename[sizeof(filename)-1] = 0;
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av_metadata_set2(&st->metadata, "filename", filename, 0);
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dprintf(s, "filename %s\n", filename);
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dprintf(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
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dprintf(s, "timescale %d\n", st->time_base.den);
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dprintf(s, "frame rate %d/%d\n",
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st->codec->time_base.num, st->codec->time_base.den);
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return 0;
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}
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static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
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{
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R3DContext *r3d = s->priv_data;
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AVStream *st = s->streams[0];
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int i;
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r3d->video_offsets_count = (atom->size - 8) / 4;
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r3d->video_offsets = av_malloc(atom->size);
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if (!r3d->video_offsets)
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return AVERROR(ENOMEM);
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for (i = 0; i < r3d->video_offsets_count; i++) {
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r3d->video_offsets[i] = get_be32(s->pb);
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if (!r3d->video_offsets[i]) {
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r3d->video_offsets_count = i;
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break;
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}
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dprintf(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
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}
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if (st->codec->time_base.den)
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st->duration = (uint64_t)r3d->video_offsets_count*
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st->time_base.den*st->codec->time_base.num/st->codec->time_base.den;
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dprintf(s, "duration %lld\n", st->duration);
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return 0;
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}
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static void r3d_read_reos(AVFormatContext *s)
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{
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R3DContext *r3d = s->priv_data;
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int tmp;
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r3d->rdvo_offset = get_be32(s->pb);
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get_be32(s->pb); // rdvs offset
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get_be32(s->pb); // rdao offset
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get_be32(s->pb); // rdas offset
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tmp = get_be32(s->pb);
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dprintf(s, "num video chunks %d\n", tmp);
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tmp = get_be32(s->pb);
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dprintf(s, "num audio chunks %d\n", tmp);
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url_fskip(s->pb, 6*4);
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}
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static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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R3DContext *r3d = s->priv_data;
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Atom atom;
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int ret;
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if (read_atom(s, &atom) < 0) {
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av_log(s, AV_LOG_ERROR, "error reading atom\n");
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return -1;
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}
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if (atom.tag == MKTAG('R','E','D','1')) {
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if ((ret = r3d_read_red1(s)) < 0) {
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av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
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return ret;
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}
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} else {
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av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
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return -1;
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}
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s->data_offset = url_ftell(s->pb);
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dprintf(s, "data offset %#llx\n", s->data_offset);
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if (url_is_streamed(s->pb))
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return 0;
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// find REOB/REOF/REOS to load index
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url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
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if (read_atom(s, &atom) < 0)
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av_log(s, AV_LOG_ERROR, "error reading end atom\n");
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if (atom.tag != MKTAG('R','E','O','B') &&
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atom.tag != MKTAG('R','E','O','F') &&
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atom.tag != MKTAG('R','E','O','S'))
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goto out;
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r3d_read_reos(s);
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if (r3d->rdvo_offset) {
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url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET);
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if (read_atom(s, &atom) < 0)
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av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
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if (atom.tag == MKTAG('R','D','V','O')) {
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if (r3d_read_rdvo(s, &atom) < 0)
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av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
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}
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}
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out:
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url_fseek(s->pb, s->data_offset, SEEK_SET);
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return 0;
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}
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static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
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{
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AVStream *st = s->streams[0];
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int tmp, tmp2;
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uint64_t pos = url_ftell(s->pb);
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unsigned dts;
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int ret;
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dts = get_be32(s->pb);
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tmp = get_be32(s->pb);
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dprintf(s, "frame num %d\n", tmp);
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tmp = get_byte(s->pb); // major version
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tmp2 = get_byte(s->pb); // minor version
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dprintf(s, "version %d.%d\n", tmp, tmp2);
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tmp = get_be16(s->pb); // unknown
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dprintf(s, "unknown %d\n", tmp);
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if (tmp > 4) {
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tmp = get_be16(s->pb); // unknown
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dprintf(s, "unknown %d\n", tmp);
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tmp = get_be16(s->pb); // unknown
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dprintf(s, "unknown %d\n", tmp);
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tmp = get_be32(s->pb);
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dprintf(s, "width %d\n", tmp);
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tmp = get_be32(s->pb);
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dprintf(s, "height %d\n", tmp);
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tmp = get_be32(s->pb);
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dprintf(s, "metadata len %d\n", tmp);
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}
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tmp = atom->size - 8 - (url_ftell(s->pb) - pos);
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if (tmp < 0)
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return -1;
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ret = av_get_packet(s->pb, pkt, tmp);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "error reading video packet\n");
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return -1;
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}
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pkt->stream_index = 0;
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pkt->dts = dts;
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if (st->codec->time_base.den)
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pkt->duration = (uint64_t)st->time_base.den*
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st->codec->time_base.num/st->codec->time_base.den;
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dprintf(s, "pkt dts %lld duration %d\n", pkt->dts, pkt->duration);
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return 0;
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}
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static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
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{
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AVStream *st = s->streams[1];
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int tmp, tmp2, samples, size;
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uint64_t pos = url_ftell(s->pb);
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unsigned dts;
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int ret;
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dts = get_be32(s->pb);
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st->codec->sample_rate = get_be32(s->pb);
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samples = get_be32(s->pb);
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tmp = get_be32(s->pb);
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dprintf(s, "packet num %d\n", tmp);
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tmp = get_be16(s->pb); // unkown
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dprintf(s, "unknown %d\n", tmp);
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tmp = get_byte(s->pb); // major version
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tmp2 = get_byte(s->pb); // minor version
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dprintf(s, "version %d.%d\n", tmp, tmp2);
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tmp = get_be32(s->pb); // unknown
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dprintf(s, "unknown %d\n", tmp);
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size = atom->size - 8 - (url_ftell(s->pb) - pos);
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if (size < 0)
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return -1;
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ret = av_get_packet(s->pb, pkt, size);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
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return ret;
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}
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pkt->stream_index = 1;
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pkt->dts = dts;
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pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
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dprintf(s, "pkt dts %lld duration %d samples %d sample rate %d\n",
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pkt->dts, pkt->duration, samples, st->codec->sample_rate);
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return 0;
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}
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static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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Atom atom;
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int err = 0;
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while (!err) {
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if (read_atom(s, &atom) < 0) {
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err = -1;
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break;
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}
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switch (atom.tag) {
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case MKTAG('R','E','D','V'):
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if (s->streams[0]->discard == AVDISCARD_ALL)
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goto skip;
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if (!(err = r3d_read_redv(s, pkt, &atom)))
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return 0;
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break;
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case MKTAG('R','E','D','A'):
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if (s->nb_streams < 2)
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return -1;
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if (s->streams[1]->discard == AVDISCARD_ALL)
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goto skip;
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if (!(err = r3d_read_reda(s, pkt, &atom)))
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return 0;
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break;
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default:
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skip:
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url_fskip(s->pb, atom.size-8);
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}
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}
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return err;
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}
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static int r3d_probe(AVProbeData *p)
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{
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if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
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{
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AVStream *st = s->streams[0]; // video stream
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R3DContext *r3d = s->priv_data;
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int frame_num;
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if (!st->codec->time_base.num || !st->time_base.den)
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return -1;
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frame_num = sample_time*st->codec->time_base.den/
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((int64_t)st->codec->time_base.num*st->time_base.den);
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dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
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if (frame_num < r3d->video_offsets_count) {
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url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
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} else {
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av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
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return -1;
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}
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return 0;
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}
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static int r3d_close(AVFormatContext *s)
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{
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R3DContext *r3d = s->priv_data;
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av_freep(&r3d->video_offsets);
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return 0;
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}
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AVInputFormat r3d_demuxer = {
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"r3d",
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NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
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sizeof(R3DContext),
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r3d_probe,
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r3d_read_header,
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r3d_read_packet,
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r3d_close,
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r3d_seek,
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};
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