PageRenderTime 72ms CodeModel.GetById 16ms app.highlight 48ms RepoModel.GetById 1ms app.codeStats 0ms

/libavformat/iff.c

http://github.com/FFmpeg/FFmpeg
C | 897 lines | 759 code | 99 blank | 39 comment | 210 complexity | c75f3f493faf2b747e10af6698a2a91d MD5 | raw file
  1/*
  2 * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
  3 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
  4 * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
  5 *
  6 * This file is part of FFmpeg.
  7 *
  8 * FFmpeg is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU Lesser General Public
 10 * License as published by the Free Software Foundation; either
 11 * version 2.1 of the License, or (at your option) any later version.
 12 *
 13 * FFmpeg is distributed in the hope that it will be useful,
 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 16 * Lesser General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU Lesser General Public
 19 * License along with FFmpeg; if not, write to the Free Software
 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 21 */
 22
 23/**
 24 * @file
 25 * IFF file demuxer
 26 * by Jaikrishnan Menon
 27 * for more information on the .iff file format, visit:
 28 * http://wiki.multimedia.cx/index.php?title=IFF
 29 */
 30
 31#include <inttypes.h>
 32
 33#include "libavutil/avassert.h"
 34#include "libavutil/channel_layout.h"
 35#include "libavutil/intreadwrite.h"
 36#include "libavutil/dict.h"
 37#include "libavcodec/bytestream.h"
 38#include "avformat.h"
 39#include "id3v2.h"
 40#include "internal.h"
 41
 42#define ID_8SVX       MKTAG('8','S','V','X')
 43#define ID_16SV       MKTAG('1','6','S','V')
 44#define ID_MAUD       MKTAG('M','A','U','D')
 45#define ID_MHDR       MKTAG('M','H','D','R')
 46#define ID_MDAT       MKTAG('M','D','A','T')
 47#define ID_VHDR       MKTAG('V','H','D','R')
 48#define ID_ATAK       MKTAG('A','T','A','K')
 49#define ID_RLSE       MKTAG('R','L','S','E')
 50#define ID_CHAN       MKTAG('C','H','A','N')
 51#define ID_PBM        MKTAG('P','B','M',' ')
 52#define ID_ILBM       MKTAG('I','L','B','M')
 53#define ID_BMHD       MKTAG('B','M','H','D')
 54#define ID_DGBL       MKTAG('D','G','B','L')
 55#define ID_CAMG       MKTAG('C','A','M','G')
 56#define ID_CMAP       MKTAG('C','M','A','P')
 57#define ID_ACBM       MKTAG('A','C','B','M')
 58#define ID_DEEP       MKTAG('D','E','E','P')
 59#define ID_RGB8       MKTAG('R','G','B','8')
 60#define ID_RGBN       MKTAG('R','G','B','N')
 61#define ID_DSD        MKTAG('D','S','D',' ')
 62#define ID_DST        MKTAG('D','S','T',' ')
 63#define ID_DSTC       MKTAG('D','S','T','C')
 64#define ID_DSTF       MKTAG('D','S','T','F')
 65#define ID_FRTE       MKTAG('F','R','T','E')
 66#define ID_ANIM       MKTAG('A','N','I','M')
 67#define ID_ANHD       MKTAG('A','N','H','D')
 68#define ID_DLTA       MKTAG('D','L','T','A')
 69#define ID_DPAN       MKTAG('D','P','A','N')
 70
 71#define ID_FORM       MKTAG('F','O','R','M')
 72#define ID_FRM8       MKTAG('F','R','M','8')
 73#define ID_ANNO       MKTAG('A','N','N','O')
 74#define ID_AUTH       MKTAG('A','U','T','H')
 75#define ID_CHRS       MKTAG('C','H','R','S')
 76#define ID_COPYRIGHT  MKTAG('(','c',')',' ')
 77#define ID_CSET       MKTAG('C','S','E','T')
 78#define ID_FVER       MKTAG('F','V','E','R')
 79#define ID_NAME       MKTAG('N','A','M','E')
 80#define ID_TEXT       MKTAG('T','E','X','T')
 81#define ID_ABIT       MKTAG('A','B','I','T')
 82#define ID_BODY       MKTAG('B','O','D','Y')
 83#define ID_DBOD       MKTAG('D','B','O','D')
 84#define ID_DPEL       MKTAG('D','P','E','L')
 85#define ID_DLOC       MKTAG('D','L','O','C')
 86#define ID_TVDC       MKTAG('T','V','D','C')
 87
 88#define LEFT    2
 89#define RIGHT   4
 90#define STEREO  6
 91
 92/**
 93 * This number of bytes if added at the beginning of each AVPacket
 94 * which contain additional information about video properties
 95 * which has to be shared between demuxer and decoder.
 96 * This number may change between frames, e.g. the demuxer might
 97 * set it to smallest possible size of 2 to indicate that there's
 98 * no extradata changing in this frame.
 99 */
100#define IFF_EXTRA_VIDEO_SIZE 41
101
102typedef enum {
103    COMP_NONE,
104    COMP_FIB,
105    COMP_EXP
106} svx8_compression_type;
107
108typedef struct IffDemuxContext {
109    int      is_64bit;  ///< chunk size is 64-bit
110    int64_t  body_pos;
111    int64_t  body_end;
112    uint32_t  body_size;
113    svx8_compression_type   svx8_compression;
114    unsigned  maud_bits;
115    unsigned  maud_compression;
116    unsigned  bitmap_compression;  ///< delta compression method used
117    unsigned  bpp;          ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
118    unsigned  ham;          ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
119    unsigned  flags;        ///< 1 for EHB, 0 is no extra half darkening
120    unsigned  transparency; ///< transparency color index in palette
121    unsigned  masking;      ///< masking method used
122    uint8_t   tvdc[32];     ///< TVDC lookup table
123    int64_t   pts;
124} IffDemuxContext;
125
126/* Metadata string read */
127static int get_metadata(AVFormatContext *s,
128                        const char *const tag,
129                        const unsigned data_size)
130{
131    uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
132
133    if (!buf)
134        return AVERROR(ENOMEM);
135
136    if (avio_read(s->pb, buf, data_size) != data_size) {
137        av_free(buf);
138        return AVERROR(EIO);
139    }
140    buf[data_size] = 0;
141    av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
142    return 0;
143}
144
145static int iff_probe(const AVProbeData *p)
146{
147    const uint8_t *d = p->buf;
148
149    if ( (AV_RL32(d)   == ID_FORM &&
150         (AV_RL32(d+8) == ID_8SVX ||
151          AV_RL32(d+8) == ID_16SV ||
152          AV_RL32(d+8) == ID_MAUD ||
153          AV_RL32(d+8) == ID_PBM  ||
154          AV_RL32(d+8) == ID_ACBM ||
155          AV_RL32(d+8) == ID_DEEP ||
156          AV_RL32(d+8) == ID_ILBM ||
157          AV_RL32(d+8) == ID_RGB8 ||
158          AV_RL32(d+8) == ID_ANIM ||
159          AV_RL32(d+8) == ID_RGBN)) ||
160         (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
161        return AVPROBE_SCORE_MAX;
162    return 0;
163}
164
165static const AVCodecTag dsd_codec_tags[] = {
166    { AV_CODEC_ID_DSD_MSBF, ID_DSD },
167    { AV_CODEC_ID_DST,      ID_DST },
168    { AV_CODEC_ID_NONE, 0 },
169};
170
171
172#define DSD_SLFT MKTAG('S','L','F','T')
173#define DSD_SRGT MKTAG('S','R','G','T')
174#define DSD_MLFT MKTAG('M','L','F','T')
175#define DSD_MRGT MKTAG('M','R','G','T')
176#define DSD_C    MKTAG('C',' ',' ',' ')
177#define DSD_LS   MKTAG('L','S',' ',' ')
178#define DSD_RS   MKTAG('R','S',' ',' ')
179#define DSD_LFE  MKTAG('L','F','E',' ')
180
181static const uint32_t dsd_stereo[]  = { DSD_SLFT, DSD_SRGT };
182static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
183static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
184
185typedef struct {
186    uint64_t layout;
187    const uint32_t * dsd_layout;
188} DSDLayoutDesc;
189
190static const DSDLayoutDesc dsd_channel_layout[] = {
191    { AV_CH_LAYOUT_STEREO,  dsd_stereo },
192    { AV_CH_LAYOUT_5POINT0, dsd_5point0 },
193    { AV_CH_LAYOUT_5POINT1, dsd_5point1 },
194};
195
196static const uint64_t dsd_loudspeaker_config[] = {
197    AV_CH_LAYOUT_STEREO,
198    0, 0,
199    AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
200};
201
202static const char * dsd_source_comment[] = {
203    "dsd_source_comment",
204    "analogue_source_comment",
205    "pcm_source_comment",
206};
207
208static const char * dsd_history_comment[] = {
209    "general_remark",
210    "operator_name",
211    "creating_machine",
212    "timezone",
213    "file_revision"
214};
215
216static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
217{
218    AVIOContext *pb = s->pb;
219
220    while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
221        uint32_t tag      = avio_rl32(pb);
222        uint64_t size     = avio_rb64(pb);
223        uint64_t orig_pos = avio_tell(pb);
224        const char * metadata_tag = NULL;
225
226        switch(tag) {
227        case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
228        case MKTAG('D','I','T','I'): metadata_tag = "title";  break;
229        }
230
231        if (metadata_tag && size > 4) {
232            unsigned int tag_size = avio_rb32(pb);
233            int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
234            if (ret < 0) {
235                av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
236                return ret;
237            }
238        }
239
240        avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
241    }
242
243    return 0;
244}
245
246static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
247{
248    AVIOContext *pb = s->pb;
249    char abss[24];
250    int hour, min, sec, i, ret, config;
251    int dsd_layout[6];
252    ID3v2ExtraMeta *id3v2_extra_meta;
253
254    while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
255        uint32_t tag      = avio_rl32(pb);
256        uint64_t size     = avio_rb64(pb);
257        uint64_t orig_pos = avio_tell(pb);
258
259        switch(tag) {
260        case MKTAG('A','B','S','S'):
261            if (size < 8)
262                return AVERROR_INVALIDDATA;
263            hour = avio_rb16(pb);
264            min  = avio_r8(pb);
265            sec  = avio_r8(pb);
266            snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
267            av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
268            break;
269
270        case MKTAG('C','H','N','L'):
271            if (size < 2)
272                return AVERROR_INVALIDDATA;
273            st->codecpar->channels       = avio_rb16(pb);
274            if (size < 2 + st->codecpar->channels * 4)
275                return AVERROR_INVALIDDATA;
276            st->codecpar->channel_layout = 0;
277            if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) {
278                avpriv_request_sample(s, "channel layout");
279                break;
280            }
281            for (i = 0; i < st->codecpar->channels; i++)
282                dsd_layout[i] = avio_rl32(pb);
283            for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
284                const DSDLayoutDesc * d = &dsd_channel_layout[i];
285                if (av_get_channel_layout_nb_channels(d->layout) == st->codecpar->channels &&
286                    !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) {
287                    st->codecpar->channel_layout = d->layout;
288                    break;
289                }
290            }
291            break;
292
293        case MKTAG('C','M','P','R'):
294            if (size < 4)
295                return AVERROR_INVALIDDATA;
296            st->codecpar->codec_tag = tag = avio_rl32(pb);
297            st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag);
298            if (!st->codecpar->codec_id) {
299                av_log(s, AV_LOG_ERROR, "'%s' compression is not supported\n",
300                       av_fourcc2str(tag));
301                return AVERROR_PATCHWELCOME;
302            }
303            break;
304
305        case MKTAG('F','S',' ',' '):
306            if (size < 4)
307                return AVERROR_INVALIDDATA;
308            st->codecpar->sample_rate = avio_rb32(pb) / 8;
309            break;
310
311        case MKTAG('I','D','3',' '):
312            id3v2_extra_meta = NULL;
313            ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
314            if (id3v2_extra_meta) {
315                if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0 ||
316                    (ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0) {
317                    ff_id3v2_free_extra_meta(&id3v2_extra_meta);
318                    return ret;
319                }
320                ff_id3v2_free_extra_meta(&id3v2_extra_meta);
321            }
322
323            if (size < avio_tell(pb) - orig_pos) {
324                av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
325                return AVERROR_INVALIDDATA;
326            }
327            break;
328
329        case MKTAG('L','S','C','O'):
330            if (size < 2)
331                return AVERROR_INVALIDDATA;
332            config = avio_rb16(pb);
333            if (config != 0xFFFF) {
334                if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
335                    st->codecpar->channel_layout = dsd_loudspeaker_config[config];
336                if (!st->codecpar->channel_layout)
337                    avpriv_request_sample(s, "loudspeaker configuration %d", config);
338            }
339            break;
340        }
341
342        avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
343    }
344
345    return 0;
346}
347
348static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
349{
350    IffDemuxContext *iff = s->priv_data;
351    AVIOContext *pb = s->pb;
352    uint32_t chunk_id;
353    uint64_t chunk_pos, data_pos, data_size;
354    int ret = AVERROR_EOF;
355
356    while (!avio_feof(pb)) {
357        chunk_pos = avio_tell(pb);
358        if (chunk_pos >= iff->body_end)
359            return AVERROR_EOF;
360
361        chunk_id = avio_rl32(pb);
362        data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
363        data_pos = avio_tell(pb);
364
365        if (data_size < 1)
366            return AVERROR_INVALIDDATA;
367
368        switch (chunk_id) {
369        case ID_DSTF:
370            if (!pkt) {
371                iff->body_pos  = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
372                iff->body_size = iff->body_end - iff->body_pos;
373                return 0;
374            }
375            ret = av_get_packet(pb, pkt, data_size);
376            if (ret < 0)
377                return ret;
378            if (data_size & 1)
379                avio_skip(pb, 1);
380            pkt->flags |= AV_PKT_FLAG_KEY;
381            pkt->stream_index = 0;
382            pkt->duration = 588 * s->streams[0]->codecpar->sample_rate / 44100;
383            pkt->pos = chunk_pos;
384
385            chunk_pos = avio_tell(pb);
386            if (chunk_pos >= iff->body_end)
387                return 0;
388
389            avio_seek(pb, chunk_pos, SEEK_SET);
390            return 0;
391
392        case ID_FRTE:
393            if (data_size < 4)
394                return AVERROR_INVALIDDATA;
395            s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100;
396            break;
397        }
398
399        avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
400    }
401
402    return ret;
403}
404
405static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
406static const uint8_t deep_rgba[]  = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
407static const uint8_t deep_bgra[]  = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
408static const uint8_t deep_argb[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
409static const uint8_t deep_abgr[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
410
411static int iff_read_header(AVFormatContext *s)
412{
413    IffDemuxContext *iff = s->priv_data;
414    AVIOContext *pb = s->pb;
415    AVStream *st;
416    uint8_t *buf;
417    uint32_t chunk_id;
418    uint64_t data_size;
419    uint32_t screenmode = 0, num, den;
420    unsigned transparency = 0;
421    unsigned masking = 0; // no mask
422    uint8_t fmt[16];
423    int fmt_size;
424
425    st = avformat_new_stream(s, NULL);
426    if (!st)
427        return AVERROR(ENOMEM);
428
429    st->codecpar->channels = 1;
430    st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
431    iff->is_64bit = avio_rl32(pb) == ID_FRM8;
432    avio_skip(pb, iff->is_64bit ? 8 : 4);
433    // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
434    st->codecpar->codec_tag = avio_rl32(pb);
435    if (st->codecpar->codec_tag == ID_ANIM) {
436        avio_skip(pb, 12);
437    }
438    iff->bitmap_compression = -1;
439    iff->svx8_compression = -1;
440    iff->maud_bits = -1;
441    iff->maud_compression = -1;
442
443    while(!avio_feof(pb)) {
444        uint64_t orig_pos;
445        int res;
446        const char *metadata_tag = NULL;
447        int version, nb_comments, i;
448        chunk_id = avio_rl32(pb);
449        data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
450        orig_pos = avio_tell(pb);
451
452        switch(chunk_id) {
453        case ID_VHDR:
454            st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
455
456            if (data_size < 14)
457                return AVERROR_INVALIDDATA;
458            avio_skip(pb, 12);
459            st->codecpar->sample_rate = avio_rb16(pb);
460            if (data_size >= 16) {
461                avio_skip(pb, 1);
462                iff->svx8_compression = avio_r8(pb);
463            }
464            break;
465
466        case ID_MHDR:
467            st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
468
469            if (data_size < 32)
470                return AVERROR_INVALIDDATA;
471            avio_skip(pb, 4);
472            iff->maud_bits = avio_rb16(pb);
473            avio_skip(pb, 2);
474            num = avio_rb32(pb);
475            den = avio_rb16(pb);
476            if (!den)
477                return AVERROR_INVALIDDATA;
478            avio_skip(pb, 2);
479            st->codecpar->sample_rate = num / den;
480            st->codecpar->channels = avio_rb16(pb);
481            iff->maud_compression = avio_rb16(pb);
482            if (st->codecpar->channels == 1)
483                st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
484            else if (st->codecpar->channels == 2)
485                st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
486            break;
487
488        case ID_ABIT:
489        case ID_BODY:
490        case ID_DBOD:
491        case ID_DSD:
492        case ID_DST:
493        case ID_MDAT:
494            iff->body_pos = avio_tell(pb);
495            iff->body_end = iff->body_pos + data_size;
496            iff->body_size = data_size;
497            if (chunk_id == ID_DST) {
498                int ret = read_dst_frame(s, NULL);
499                if (ret < 0)
500                    return ret;
501            }
502            break;
503
504        case ID_CHAN:
505            if (data_size < 4)
506                return AVERROR_INVALIDDATA;
507            if (avio_rb32(pb) < 6) {
508                st->codecpar->channels       = 1;
509                st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
510            } else {
511                st->codecpar->channels       = 2;
512                st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
513            }
514            break;
515
516        case ID_CAMG:
517            if (data_size < 4)
518                return AVERROR_INVALIDDATA;
519            screenmode                = avio_rb32(pb);
520            break;
521
522        case ID_CMAP:
523            if (data_size < 3 || data_size > 768 || data_size % 3) {
524                 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
525                        data_size);
526                 return AVERROR_INVALIDDATA;
527            }
528            res = ff_alloc_extradata(st->codecpar,
529                                     data_size + IFF_EXTRA_VIDEO_SIZE);
530            if (res < 0)
531                return res;
532            if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) {
533                av_freep(&st->codecpar->extradata);
534                st->codecpar->extradata_size = 0;
535                return AVERROR(EIO);
536            }
537            break;
538
539        case ID_BMHD:
540            st->codecpar->codec_type            = AVMEDIA_TYPE_VIDEO;
541            if (data_size <= 8)
542                return AVERROR_INVALIDDATA;
543            st->codecpar->width                 = avio_rb16(pb);
544            st->codecpar->height                = avio_rb16(pb);
545            avio_skip(pb, 4); // x, y offset
546            st->codecpar->bits_per_coded_sample = avio_r8(pb);
547            if (data_size >= 10)
548                masking                      = avio_r8(pb);
549            if (data_size >= 11)
550                iff->bitmap_compression      = avio_r8(pb);
551            if (data_size >= 14) {
552                avio_skip(pb, 1); // padding
553                transparency                 = avio_rb16(pb);
554            }
555            if (data_size >= 16) {
556                st->sample_aspect_ratio.num  = avio_r8(pb);
557                st->sample_aspect_ratio.den  = avio_r8(pb);
558            }
559            break;
560
561        case ID_ANHD:
562            break;
563
564        case ID_DPAN:
565            avio_skip(pb, 2);
566            st->duration = avio_rb16(pb);
567            break;
568
569        case ID_DPEL:
570            if (data_size < 4 || (data_size & 3))
571                return AVERROR_INVALIDDATA;
572            if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
573                return fmt_size;
574            if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
575                st->codecpar->format = AV_PIX_FMT_RGB24;
576            else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
577                st->codecpar->format = AV_PIX_FMT_RGBA;
578            else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
579                st->codecpar->format = AV_PIX_FMT_BGRA;
580            else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
581                st->codecpar->format = AV_PIX_FMT_ARGB;
582            else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
583                st->codecpar->format = AV_PIX_FMT_ABGR;
584            else {
585                avpriv_request_sample(s, "color format %.16s", fmt);
586                return AVERROR_PATCHWELCOME;
587            }
588            break;
589
590        case ID_DGBL:
591            st->codecpar->codec_type         = AVMEDIA_TYPE_VIDEO;
592            if (data_size < 8)
593                return AVERROR_INVALIDDATA;
594            st->codecpar->width              = avio_rb16(pb);
595            st->codecpar->height             = avio_rb16(pb);
596            iff->bitmap_compression          = avio_rb16(pb);
597            st->sample_aspect_ratio.num      = avio_r8(pb);
598            st->sample_aspect_ratio.den      = avio_r8(pb);
599            st->codecpar->bits_per_coded_sample = 24;
600            break;
601
602        case ID_DLOC:
603            if (data_size < 4)
604                return AVERROR_INVALIDDATA;
605            st->codecpar->width  = avio_rb16(pb);
606            st->codecpar->height = avio_rb16(pb);
607            break;
608
609        case ID_TVDC:
610            if (data_size < sizeof(iff->tvdc))
611                return AVERROR_INVALIDDATA;
612            res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
613            if (res < 0)
614                return res;
615            break;
616
617        case ID_ANNO:
618        case ID_TEXT:      metadata_tag = "comment";   break;
619        case ID_AUTH:      metadata_tag = "artist";    break;
620        case ID_COPYRIGHT: metadata_tag = "copyright"; break;
621        case ID_NAME:      metadata_tag = "title";     break;
622
623        /* DSD tags */
624
625        case MKTAG('F','V','E','R'):
626            if (data_size < 4)
627                return AVERROR_INVALIDDATA;
628            version = avio_rb32(pb);
629            av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
630            st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
631            break;
632
633        case MKTAG('D','I','I','N'):
634            res = parse_dsd_diin(s, st, orig_pos + data_size);
635            if (res < 0)
636                return res;
637            break;
638
639        case MKTAG('P','R','O','P'):
640            if (data_size < 4)
641                return AVERROR_INVALIDDATA;
642            if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
643                avpriv_request_sample(s, "unknown property type");
644                break;
645            }
646            res = parse_dsd_prop(s, st, orig_pos + data_size);
647            if (res < 0)
648                return res;
649            break;
650
651        case MKTAG('C','O','M','T'):
652            if (data_size < 2)
653                return AVERROR_INVALIDDATA;
654            nb_comments = avio_rb16(pb);
655            for (i = 0; i < nb_comments; i++) {
656                int year, mon, day, hour, min, type, ref;
657                char tmp[24];
658                const char *tag;
659                int metadata_size;
660
661                year = avio_rb16(pb);
662                mon  = avio_r8(pb);
663                day  = avio_r8(pb);
664                hour = avio_r8(pb);
665                min  = avio_r8(pb);
666                snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
667                av_dict_set(&st->metadata, "comment_time", tmp, 0);
668
669                type = avio_rb16(pb);
670                ref  = avio_rb16(pb);
671                switch (type) {
672                case 1:
673                    if (!i)
674                        tag = "channel_comment";
675                    else {
676                        snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
677                        tag = tmp;
678                    }
679                    break;
680                case 2:
681                    tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
682                    break;
683                case 3:
684                    tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
685                    break;
686                default:
687                    tag = "comment";
688                }
689
690                metadata_size  = avio_rb32(pb);
691                if ((res = get_metadata(s, tag, metadata_size)) < 0) {
692                    av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
693                    return res;
694                }
695
696                if (metadata_size & 1)
697                    avio_skip(pb, 1);
698            }
699            break;
700        }
701
702        if (metadata_tag) {
703            if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
704                av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
705                return res;
706            }
707        }
708        avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
709    }
710
711    if (st->codecpar->codec_tag == ID_ANIM)
712        avio_seek(pb, 12, SEEK_SET);
713    else
714        avio_seek(pb, iff->body_pos, SEEK_SET);
715
716    switch(st->codecpar->codec_type) {
717    case AVMEDIA_TYPE_AUDIO:
718        avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
719
720        if (st->codecpar->codec_tag == ID_16SV)
721            st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
722        else if (st->codecpar->codec_tag == ID_MAUD) {
723            if (iff->maud_bits == 8 && !iff->maud_compression) {
724                st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
725            } else if (iff->maud_bits == 16 && !iff->maud_compression) {
726                st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
727            } else if (iff->maud_bits ==  8 && iff->maud_compression == 2) {
728                st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
729            } else if (iff->maud_bits ==  8 && iff->maud_compression == 3) {
730                st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
731            } else {
732                avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
733                return AVERROR_PATCHWELCOME;
734            }
735        } else if (st->codecpar->codec_tag != ID_DSD &&
736                   st->codecpar->codec_tag != ID_DST) {
737            switch (iff->svx8_compression) {
738            case COMP_NONE:
739                st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
740                break;
741            case COMP_FIB:
742                st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
743                break;
744            case COMP_EXP:
745                st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
746                break;
747            default:
748                av_log(s, AV_LOG_ERROR,
749                       "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
750                return -1;
751            }
752        }
753
754        st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
755        st->codecpar->bit_rate = (int64_t)st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample;
756        st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample;
757        if (st->codecpar->codec_tag == ID_DSD && st->codecpar->block_align <= 0)
758            return AVERROR_INVALIDDATA;
759        break;
760
761    case AVMEDIA_TYPE_VIDEO:
762        iff->bpp          = st->codecpar->bits_per_coded_sample;
763        if (st->codecpar->codec_tag == ID_ANIM)
764            avpriv_set_pts_info(st, 32, 1, 60);
765        if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
766            iff->ham      = iff->bpp > 6 ? 6 : 4;
767            st->codecpar->bits_per_coded_sample = 24;
768        }
769        iff->flags        = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
770        iff->masking      = masking;
771        iff->transparency = transparency;
772
773        if (!st->codecpar->extradata) {
774            int ret = ff_alloc_extradata(st->codecpar, IFF_EXTRA_VIDEO_SIZE);
775            if (ret < 0)
776                return ret;
777        }
778        av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
779        buf = st->codecpar->extradata;
780        bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
781        bytestream_put_byte(&buf, iff->bitmap_compression);
782        bytestream_put_byte(&buf, iff->bpp);
783        bytestream_put_byte(&buf, iff->ham);
784        bytestream_put_byte(&buf, iff->flags);
785        bytestream_put_be16(&buf, iff->transparency);
786        bytestream_put_byte(&buf, iff->masking);
787        bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
788        st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
789        break;
790    default:
791        return -1;
792    }
793
794    return 0;
795}
796
797static unsigned get_anim_duration(uint8_t *buf, int size)
798{
799    GetByteContext gb;
800
801    bytestream2_init(&gb, buf, size);
802    bytestream2_skip(&gb, 4);
803    while (bytestream2_get_bytes_left(&gb) > 8) {
804        unsigned chunk = bytestream2_get_le32(&gb);
805        unsigned size = bytestream2_get_be32(&gb);
806
807        if (chunk == ID_ANHD) {
808            if (size < 40)
809                break;
810            bytestream2_skip(&gb, 14);
811            return bytestream2_get_be32(&gb);
812        } else {
813            bytestream2_skip(&gb, size + size & 1);
814        }
815    }
816    return 10;
817}
818
819static int iff_read_packet(AVFormatContext *s,
820                           AVPacket *pkt)
821{
822    IffDemuxContext *iff = s->priv_data;
823    AVIOContext *pb = s->pb;
824    AVStream *st = s->streams[0];
825    int ret;
826    int64_t pos = avio_tell(pb);
827
828    if (avio_feof(pb))
829        return AVERROR_EOF;
830    if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
831        return AVERROR_EOF;
832
833    if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
834        if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
835            ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
836        } else if (st->codecpar->codec_tag == ID_DST) {
837            return read_dst_frame(s, pkt);
838        } else {
839            if (iff->body_size > INT_MAX)
840                return AVERROR_INVALIDDATA;
841            ret = av_get_packet(pb, pkt, iff->body_size);
842        }
843    } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
844               st->codecpar->codec_tag  == ID_ANIM) {
845        uint64_t data_size, orig_pos;
846        uint32_t chunk_id, chunk_id2;
847
848        while (!avio_feof(pb)) {
849            if (avio_feof(pb))
850                return AVERROR_EOF;
851
852            orig_pos  = avio_tell(pb);
853            chunk_id  = avio_rl32(pb);
854            data_size = avio_rb32(pb);
855            chunk_id2 = avio_rl32(pb);
856
857            if (chunk_id  == ID_FORM &&
858                chunk_id2 == ID_ILBM) {
859                avio_skip(pb, -4);
860                break;
861            } else if (chunk_id == ID_FORM &&
862                       chunk_id2 == ID_ANIM) {
863                continue;
864            } else {
865                avio_skip(pb, data_size);
866            }
867        }
868        ret = av_get_packet(pb, pkt, data_size);
869        pkt->pos = orig_pos;
870        pkt->duration = get_anim_duration(pkt->data, pkt->size);
871        if (pos == 12)
872            pkt->flags |= AV_PKT_FLAG_KEY;
873    } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
874               st->codecpar->codec_tag  != ID_ANIM) {
875        ret = av_get_packet(pb, pkt, iff->body_size);
876        pkt->pos = pos;
877        if (pos == iff->body_pos)
878            pkt->flags |= AV_PKT_FLAG_KEY;
879    } else {
880        av_assert0(0);
881    }
882
883    if (ret < 0)
884        return ret;
885    pkt->stream_index = 0;
886    return ret;
887}
888
889AVInputFormat ff_iff_demuxer = {
890    .name           = "iff",
891    .long_name      = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
892    .priv_data_size = sizeof(IffDemuxContext),
893    .read_probe     = iff_probe,
894    .read_header    = iff_read_header,
895    .read_packet    = iff_read_packet,
896    .flags          = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
897};