1/*
2 * R3D REDCODE demuxer
3 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22//#define DEBUG
23
24#include "libavutil/intreadwrite.h"
25#include "avformat.h"
26
27typedef struct {
28    unsigned video_offsets_count;
29    unsigned *video_offsets;
30    unsigned rdvo_offset;
31} R3DContext;
32
33typedef struct {
34    unsigned size;
35    uint32_t tag;
36    uint64_t offset;
37} Atom;
38
39static int read_atom(AVFormatContext *s, Atom *atom)
40{
41    atom->offset = url_ftell(s->pb);
42    atom->size = get_be32(s->pb);
43    if (atom->size < 8)
44        return -1;
45    atom->tag = get_le32(s->pb);
46    dprintf(s, "atom %d %.4s offset %#llx\n",
47            atom->size, (char*)&atom->tag, atom->offset);
48    return atom->size;
49}
50
51static int r3d_read_red1(AVFormatContext *s)
52{
53    AVStream *st = av_new_stream(s, 0);
54    char filename[258];
55    int tmp, tmp2;
56
57    if (!st)
58        return AVERROR(ENOMEM);
59    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
60    st->codec->codec_id = CODEC_ID_JPEG2000;
61
62    tmp  = get_byte(s->pb); // major version
63    tmp2 = get_byte(s->pb); // minor version
64    dprintf(s, "version %d.%d\n", tmp, tmp2);
65
66    tmp = get_be16(s->pb); // unknown
67    dprintf(s, "unknown1 %d\n", tmp);
68
69    tmp = get_be32(s->pb);
70    av_set_pts_info(st, 32, 1, tmp);
71
72    tmp = get_be32(s->pb); // filenum
73    dprintf(s, "filenum %d\n", tmp);
74
75    url_fskip(s->pb, 32); // unknown
76
77    st->codec->width  = get_be32(s->pb);
78    st->codec->height = get_be32(s->pb);
79
80    tmp = get_be16(s->pb); // unknown
81    dprintf(s, "unknown2 %d\n", tmp);
82
83    st->codec->time_base.den = get_be16(s->pb);
84    st->codec->time_base.num = get_be16(s->pb);
85
86    tmp = get_byte(s->pb); // audio channels
87    dprintf(s, "audio channels %d\n", tmp);
88    if (tmp > 0) {
89        AVStream *ast = av_new_stream(s, 1);
90        if (!ast)
91            return AVERROR(ENOMEM);
92        ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
93        ast->codec->codec_id = CODEC_ID_PCM_S32BE;
94        ast->codec->channels = tmp;
95        av_set_pts_info(ast, 32, 1, st->time_base.den);
96    }
97
98    get_buffer(s->pb, filename, 257);
99    filename[sizeof(filename)-1] = 0;
100    av_metadata_set2(&st->metadata, "filename", filename, 0);
101
102    dprintf(s, "filename %s\n", filename);
103    dprintf(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
104    dprintf(s, "timescale %d\n", st->time_base.den);
105    dprintf(s, "frame rate %d/%d\n",
106            st->codec->time_base.num, st->codec->time_base.den);
107
108    return 0;
109}
110
111static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
112{
113    R3DContext *r3d = s->priv_data;
114    AVStream *st = s->streams[0];
115    int i;
116
117    r3d->video_offsets_count = (atom->size - 8) / 4;
118    r3d->video_offsets = av_malloc(atom->size);
119    if (!r3d->video_offsets)
120        return AVERROR(ENOMEM);
121
122    for (i = 0; i < r3d->video_offsets_count; i++) {
123        r3d->video_offsets[i] = get_be32(s->pb);
124        if (!r3d->video_offsets[i]) {
125            r3d->video_offsets_count = i;
126            break;
127        }
128        dprintf(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
129    }
130
131    if (st->codec->time_base.den)
132        st->duration = (uint64_t)r3d->video_offsets_count*
133            st->time_base.den*st->codec->time_base.num/st->codec->time_base.den;
134    dprintf(s, "duration %lld\n", st->duration);
135
136    return 0;
137}
138
139static void r3d_read_reos(AVFormatContext *s)
140{
141    R3DContext *r3d = s->priv_data;
142    int tmp;
143
144    r3d->rdvo_offset = get_be32(s->pb);
145    get_be32(s->pb); // rdvs offset
146    get_be32(s->pb); // rdao offset
147    get_be32(s->pb); // rdas offset
148
149    tmp = get_be32(s->pb);
150    dprintf(s, "num video chunks %d\n", tmp);
151
152    tmp = get_be32(s->pb);
153    dprintf(s, "num audio chunks %d\n", tmp);
154
155    url_fskip(s->pb, 6*4);
156}
157
158static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
159{
160    R3DContext *r3d = s->priv_data;
161    Atom atom;
162    int ret;
163
164    if (read_atom(s, &atom) < 0) {
165        av_log(s, AV_LOG_ERROR, "error reading atom\n");
166        return -1;
167    }
168    if (atom.tag == MKTAG('R','E','D','1')) {
169        if ((ret = r3d_read_red1(s)) < 0) {
170            av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
171            return ret;
172        }
173    } else {
174        av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
175        return -1;
176    }
177
178    s->data_offset = url_ftell(s->pb);
179    dprintf(s, "data offset %#llx\n", s->data_offset);
180    if (url_is_streamed(s->pb))
181        return 0;
182    // find REOB/REOF/REOS to load index
183    url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
184    if (read_atom(s, &atom) < 0)
185        av_log(s, AV_LOG_ERROR, "error reading end atom\n");
186
187    if (atom.tag != MKTAG('R','E','O','B') &&
188        atom.tag != MKTAG('R','E','O','F') &&
189        atom.tag != MKTAG('R','E','O','S'))
190        goto out;
191
192    r3d_read_reos(s);
193
194    if (r3d->rdvo_offset) {
195        url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET);
196        if (read_atom(s, &atom) < 0)
197            av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
198        if (atom.tag == MKTAG('R','D','V','O')) {
199            if (r3d_read_rdvo(s, &atom) < 0)
200                av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
201        }
202    }
203
204 out:
205    url_fseek(s->pb, s->data_offset, SEEK_SET);
206    return 0;
207}
208
209static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
210{
211    AVStream *st = s->streams[0];
212    int tmp, tmp2;
213    uint64_t pos = url_ftell(s->pb);
214    unsigned dts;
215    int ret;
216
217    dts = get_be32(s->pb);
218
219    tmp = get_be32(s->pb);
220    dprintf(s, "frame num %d\n", tmp);
221
222    tmp  = get_byte(s->pb); // major version
223    tmp2 = get_byte(s->pb); // minor version
224    dprintf(s, "version %d.%d\n", tmp, tmp2);
225
226    tmp = get_be16(s->pb); // unknown
227    dprintf(s, "unknown %d\n", tmp);
228
229    if (tmp > 4) {
230        tmp = get_be16(s->pb); // unknown
231        dprintf(s, "unknown %d\n", tmp);
232
233        tmp = get_be16(s->pb); // unknown
234        dprintf(s, "unknown %d\n", tmp);
235
236        tmp = get_be32(s->pb);
237        dprintf(s, "width %d\n", tmp);
238        tmp = get_be32(s->pb);
239        dprintf(s, "height %d\n", tmp);
240
241        tmp = get_be32(s->pb);
242        dprintf(s, "metadata len %d\n", tmp);
243    }
244    tmp = atom->size - 8 - (url_ftell(s->pb) - pos);
245    if (tmp < 0)
246        return -1;
247    ret = av_get_packet(s->pb, pkt, tmp);
248    if (ret < 0) {
249        av_log(s, AV_LOG_ERROR, "error reading video packet\n");
250        return -1;
251    }
252
253    pkt->stream_index = 0;
254    pkt->dts = dts;
255    if (st->codec->time_base.den)
256        pkt->duration = (uint64_t)st->time_base.den*
257            st->codec->time_base.num/st->codec->time_base.den;
258    dprintf(s, "pkt dts %lld duration %d\n", pkt->dts, pkt->duration);
259
260    return 0;
261}
262
263static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
264{
265    AVStream *st = s->streams[1];
266    int tmp, tmp2, samples, size;
267    uint64_t pos = url_ftell(s->pb);
268    unsigned dts;
269    int ret;
270
271    dts = get_be32(s->pb);
272
273    st->codec->sample_rate = get_be32(s->pb);
274
275    samples = get_be32(s->pb);
276
277    tmp = get_be32(s->pb);
278    dprintf(s, "packet num %d\n", tmp);
279
280    tmp = get_be16(s->pb); // unkown
281    dprintf(s, "unknown %d\n", tmp);
282
283    tmp  = get_byte(s->pb); // major version
284    tmp2 = get_byte(s->pb); // minor version
285    dprintf(s, "version %d.%d\n", tmp, tmp2);
286
287    tmp = get_be32(s->pb); // unknown
288    dprintf(s, "unknown %d\n", tmp);
289
290    size = atom->size - 8 - (url_ftell(s->pb) - pos);
291    if (size < 0)
292        return -1;
293    ret = av_get_packet(s->pb, pkt, size);
294    if (ret < 0) {
295        av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
296        return ret;
297    }
298
299    pkt->stream_index = 1;
300    pkt->dts = dts;
301    pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
302    dprintf(s, "pkt dts %lld duration %d samples %d sample rate %d\n",
303            pkt->dts, pkt->duration, samples, st->codec->sample_rate);
304
305    return 0;
306}
307
308static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
309{
310    Atom atom;
311    int err = 0;
312
313    while (!err) {
314        if (read_atom(s, &atom) < 0) {
315            err = -1;
316            break;
317        }
318        switch (atom.tag) {
319        case MKTAG('R','E','D','V'):
320            if (s->streams[0]->discard == AVDISCARD_ALL)
321                goto skip;
322            if (!(err = r3d_read_redv(s, pkt, &atom)))
323                return 0;
324            break;
325        case MKTAG('R','E','D','A'):
326            if (s->nb_streams < 2)
327                return -1;
328            if (s->streams[1]->discard == AVDISCARD_ALL)
329                goto skip;
330            if (!(err = r3d_read_reda(s, pkt, &atom)))
331                return 0;
332            break;
333        default:
334        skip:
335            url_fskip(s->pb, atom.size-8);
336        }
337    }
338    return err;
339}
340
341static int r3d_probe(AVProbeData *p)
342{
343    if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
344        return AVPROBE_SCORE_MAX;
345    return 0;
346}
347
348static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
349{
350    AVStream *st = s->streams[0]; // video stream
351    R3DContext *r3d = s->priv_data;
352    int frame_num;
353
354    if (!st->codec->time_base.num || !st->time_base.den)
355        return -1;
356
357    frame_num = sample_time*st->codec->time_base.den/
358        ((int64_t)st->codec->time_base.num*st->time_base.den);
359    dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
360
361    if (frame_num < r3d->video_offsets_count) {
362        url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
363    } else {
364        av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
365        return -1;
366    }
367
368    return 0;
369}
370
371static int r3d_close(AVFormatContext *s)
372{
373    R3DContext *r3d = s->priv_data;
374
375    av_freep(&r3d->video_offsets);
376
377    return 0;
378}
379
380AVInputFormat r3d_demuxer = {
381    "r3d",
382    NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
383    sizeof(R3DContext),
384    r3d_probe,
385    r3d_read_header,
386    r3d_read_packet,
387    r3d_close,
388    r3d_seek,
389};
390