R3D REDCODE demuxer

Originally committed as revision 16692 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 384 insertions, 0 deletions

diff --git a/libavformat/r3d.c b/libavformat/r3d.c
new file mode 100644
index 0000000000..20f41f5944
--- /dev/null
+++ b/libavformat/r3d.c
@@ -0,0 +1,384 @@
+/*
+ * 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
+ */
+
+//#define DEBUG
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+
+typedef struct {
+    unsigned video_offsets_count;
+    unsigned *video_offsets;
+    unsigned rdvo_offset;
+} R3DContext;
+
+typedef struct {
+    unsigned size;
+    uint32_t tag;
+    uint64_t offset;
+} Atom;
+
+static int read_atom(AVFormatContext *s, Atom *atom)
+{
+    atom->offset = url_ftell(s->pb);
+    atom->size = get_be32(s->pb);
+    if (atom->size < 8)
+        return -1;
+    atom->tag = get_le32(s->pb);
+    dprintf(s, "atom %d %.4s offset %#llx\n",
+            atom->size, (char*)&atom->tag, atom->offset);
+    return atom->size;
+}
+
+static int r3d_read_red1(AVFormatContext *s)
+{
+    AVStream *st = av_new_stream(s, 0);
+    int tmp, tmp2;
+
+    if (!st)
+        return -1;
+    st->codec->codec_type = CODEC_TYPE_VIDEO;
+    st->codec->codec_id = CODEC_ID_JPEG2000;
+
+    tmp  = get_byte(s->pb); // major version
+    tmp2 = get_byte(s->pb); // minor version
+    dprintf(s, "version %d.%d\n", tmp, tmp2);
+
+    tmp = get_be16(s->pb); // unknown
+    dprintf(s, "unknown1 %d\n", tmp);
+
+    tmp = get_be32(s->pb);
+    av_set_pts_info(st, 32, 1, tmp);
+
+    tmp = get_be32(s->pb); // filenum
+    dprintf(s, "filenum %d\n", tmp);
+
+    url_fskip(s->pb, 32); // unknown
+
+    st->codec->width  = get_be32(s->pb);
+    st->codec->height = get_be32(s->pb);
+
+    tmp = get_be16(s->pb); // unknown
+    dprintf(s, "unknown2 %d\n", tmp);
+
+    st->codec->time_base.den = get_be16(s->pb);
+    st->codec->time_base.num = get_be16(s->pb);
+
+    tmp = get_byte(s->pb); // audio channels
+    dprintf(s, "audio channels %d\n", tmp);
+    if (tmp > 0) {
+        AVStream *ast = av_new_stream(s, 1);
+        ast->codec->codec_type = CODEC_TYPE_AUDIO;
+        ast->codec->codec_id = CODEC_ID_PCM_S32BE;
+        ast->codec->channels = tmp;
+        av_set_pts_info(ast, 32, 1, st->time_base.den);
+    }
+
+    st->filename = av_mallocz(258);
+    if (!st->filename)
+        return AVERROR(ENOMEM);
+    get_buffer(s->pb, st->filename, 257);
+
+    dprintf(s, "filename %s\n", st->filename);
+    dprintf(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
+    dprintf(s, "timescale %d\n", st->time_base.den);
+    dprintf(s, "frame rate %d/%d\n",
+            st->codec->time_base.num, st->codec->time_base.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] = get_be32(s->pb);
+        if (!r3d->video_offsets[i]) {
+            r3d->video_offsets_count = i;
+            break;
+        }
+        dprintf(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
+    }
+
+    if (st->codec->time_base.den)
+        st->duration = (uint64_t)r3d->video_offsets_count*
+            st->time_base.den*st->codec->time_base.num/st->codec->time_base.den;
+    dprintf(s, "duration %lld\n", st->duration);
+
+    return 0;
+}
+
+static void r3d_read_reos(AVFormatContext *s)
+{
+    R3DContext *r3d = s->priv_data;
+    int tmp;
+
+    r3d->rdvo_offset = get_be32(s->pb);
+    get_be32(s->pb); // rdvs offset
+    get_be32(s->pb); // rdao offset
+    get_be32(s->pb); // rdas offset
+
+    tmp = get_be32(s->pb);
+    dprintf(s, "num video chunks %d\n", tmp);
+
+    tmp = get_be32(s->pb);
+    dprintf(s, "num audio chunks %d\n", tmp);
+
+    url_fskip(s->pb, 6*4);
+}
+
+static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    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->data_offset = url_ftell(s->pb);
+    dprintf(s, "data offset %#llx\n", s->data_offset);
+    if (url_is_streamed(s->pb))
+        return 0;
+    // find REOB/REOF/REOS to load index
+    url_fseek(s->pb, url_fsize(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) {
+        url_fseek(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:
+    url_fseek(s->pb, s->data_offset, SEEK_SET);
+    return 0;
+}
+
+static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
+{
+    AVStream *st = s->streams[0];
+    int tmp, tmp2;
+    uint64_t pos = url_ftell(s->pb);
+    unsigned dts;
+
+    dts = get_be32(s->pb);
+
+    tmp = get_be32(s->pb);
+    dprintf(s, "frame num %d\n", tmp);
+
+    tmp  = get_byte(s->pb); // major version
+    tmp2 = get_byte(s->pb); // minor version
+    dprintf(s, "version %d.%d\n", tmp, tmp2);
+
+    tmp = get_be16(s->pb); // unknown
+    dprintf(s, "unknown %d\n", tmp);
+
+    if (tmp > 4) {
+        tmp = get_be16(s->pb); // unknown
+        dprintf(s, "unknown %d\n", tmp);
+
+        tmp = get_be16(s->pb); // unknown
+        dprintf(s, "unknown %d\n", tmp);
+
+        tmp = get_be32(s->pb);
+        dprintf(s, "width %d\n", tmp);
+        tmp = get_be32(s->pb);
+        dprintf(s, "height %d\n", tmp);
+
+        tmp = get_be32(s->pb);
+        dprintf(s, "metadata len %d\n", tmp);
+    }
+    tmp = atom->size - 8 - (url_ftell(s->pb) - pos);
+    if (tmp < 0)
+        return -1;
+
+    if (av_get_packet(s->pb, pkt, tmp) != tmp) {
+        av_log(s, AV_LOG_ERROR, "error reading video packet\n");
+        return -1;
+    }
+
+    pkt->stream_index = 0;
+    pkt->dts = dts;
+    if (st->codec->time_base.den)
+        pkt->duration = (uint64_t)st->time_base.den*
+            st->codec->time_base.num/st->codec->time_base.den;
+    dprintf(s, "pkt dts %lld 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 tmp, tmp2, samples, size;
+    uint64_t pos = url_ftell(s->pb);
+    unsigned dts;
+
+    dts = get_be32(s->pb);
+
+    st->codec->sample_rate = get_be32(s->pb);
+
+    samples = get_be32(s->pb);
+
+    tmp = get_be32(s->pb);
+    dprintf(s, "packet num %d\n", tmp);
+
+    tmp = get_be16(s->pb); // unkown
+    dprintf(s, "unknown %d\n", tmp);
+
+    tmp  = get_byte(s->pb); // major version
+    tmp2 = get_byte(s->pb); // minor version
+    dprintf(s, "version %d.%d\n", tmp, tmp2);
+
+    tmp = get_be32(s->pb); // unknown
+    dprintf(s, "unknown %d\n", tmp);
+
+    size = atom->size - 8 - (url_ftell(s->pb) - pos);
+    if (size < 0)
+        return -1;
+    if (av_get_packet(s->pb, pkt, size) != size) {
+        av_log(s, AV_LOG_ERROR, "error reading video packet\n");
+        return -1;
+    }
+
+    pkt->stream_index = 1;
+    pkt->dts = dts;
+    pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
+    dprintf(s, "pkt dts %lld 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:
+            url_fskip(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->codec->time_base.num || !st->time_base.den)
+        return -1;
+
+    frame_num = sample_time*st->codec->time_base.den/
+        ((int64_t)st->codec->time_base.num*st->time_base.den);
+    dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
+
+    if (frame_num < r3d->video_offsets_count) {
+        url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
+    } 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 r3d_demuxer = {
+    "r3d",
+    NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
+    sizeof(R3DContext),
+    r3d_probe,
+    r3d_read_header,
+    r3d_read_packet,
+    r3d_close,
+    r3d_seek,
+};