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n3.4.14
libavformat/iff.c
913 строк
32 KB
Michael Niedermayer
avformat/iff: Check that we have a stream in read_dst_frame()
12 мар 2025, 00:23
Не верифицирован
12 мар 2025, 00:23
dae907d
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/* * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net> * Copyright (c) 2010 Peter Ross <pross@xvid.org> * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.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 */ /** * @file * IFF file demuxer * by Jaikrishnan Menon * for more information on the .iff file format, visit: * http://wiki.multimedia.cx/index.php?title=IFF */ #include <inttypes.h> #include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/intreadwrite.h" #include "libavutil/dict.h" #include "libavcodec/bytestream.h" #include "avformat.h" #include "id3v2.h" #include "internal.h" #define ID_8SVX MKTAG('8','S','V','X') #define ID_16SV MKTAG('1','6','S','V') #define ID_MAUD MKTAG('M','A','U','D') #define ID_MHDR MKTAG('M','H','D','R') #define ID_MDAT MKTAG('M','D','A','T') #define ID_VHDR MKTAG('V','H','D','R') #define ID_ATAK MKTAG('A','T','A','K') #define ID_RLSE MKTAG('R','L','S','E') #define ID_CHAN MKTAG('C','H','A','N') #define ID_PBM MKTAG('P','B','M',' ') #define ID_ILBM MKTAG('I','L','B','M') #define ID_BMHD MKTAG('B','M','H','D') #define ID_DGBL MKTAG('D','G','B','L') #define ID_CAMG MKTAG('C','A','M','G') #define ID_CMAP MKTAG('C','M','A','P') #define ID_ACBM MKTAG('A','C','B','M') #define ID_DEEP MKTAG('D','E','E','P') #define ID_RGB8 MKTAG('R','G','B','8') #define ID_RGBN MKTAG('R','G','B','N') #define ID_DSD MKTAG('D','S','D',' ') #define ID_DST MKTAG('D','S','T',' ') #define ID_DSTC MKTAG('D','S','T','C') #define ID_DSTF MKTAG('D','S','T','F') #define ID_FRTE MKTAG('F','R','T','E') #define ID_ANIM MKTAG('A','N','I','M') #define ID_ANHD MKTAG('A','N','H','D') #define ID_DLTA MKTAG('D','L','T','A') #define ID_DPAN MKTAG('D','P','A','N') #define ID_FORM MKTAG('F','O','R','M') #define ID_FRM8 MKTAG('F','R','M','8') #define ID_ANNO MKTAG('A','N','N','O') #define ID_AUTH MKTAG('A','U','T','H') #define ID_CHRS MKTAG('C','H','R','S') #define ID_COPYRIGHT MKTAG('(','c',')',' ') #define ID_CSET MKTAG('C','S','E','T') #define ID_FVER MKTAG('F','V','E','R') #define ID_NAME MKTAG('N','A','M','E') #define ID_TEXT MKTAG('T','E','X','T') #define ID_ABIT MKTAG('A','B','I','T') #define ID_BODY MKTAG('B','O','D','Y') #define ID_DBOD MKTAG('D','B','O','D') #define ID_DPEL MKTAG('D','P','E','L') #define ID_DLOC MKTAG('D','L','O','C') #define ID_TVDC MKTAG('T','V','D','C') #define LEFT 2 #define RIGHT 4 #define STEREO 6 /** * This number of bytes if added at the beginning of each AVPacket * which contain additional information about video properties * which has to be shared between demuxer and decoder. * This number may change between frames, e.g. the demuxer might * set it to smallest possible size of 2 to indicate that there's * no extradata changing in this frame. */ #define IFF_EXTRA_VIDEO_SIZE 41 typedef enum { COMP_NONE, COMP_FIB, COMP_EXP } svx8_compression_type; typedef struct IffDemuxContext { int is_64bit; ///< chunk size is 64-bit int64_t body_pos; int64_t body_end; uint32_t body_size; svx8_compression_type svx8_compression; unsigned maud_bits; unsigned maud_compression; unsigned bitmap_compression; ///< delta compression method used unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) unsigned flags; ///< 1 for EHB, 0 is no extra half darkening unsigned transparency; ///< transparency color index in palette unsigned masking; ///< masking method used uint8_t tvdc[32]; ///< TVDC lookup table int64_t pts; } IffDemuxContext; /* Metadata string read */ static int get_metadata(AVFormatContext *s, const char *const tag, const unsigned data_size) { uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1); if (!buf) return AVERROR(ENOMEM); if (avio_read(s->pb, buf, data_size) != data_size) { av_free(buf); return AVERROR(EIO); } buf[data_size] = 0; av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL); return 0; } static int iff_probe(AVProbeData *p) { const uint8_t *d = p->buf; if ( (AV_RL32(d) == ID_FORM && (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_16SV || AV_RL32(d+8) == ID_MAUD || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ACBM || AV_RL32(d+8) == ID_DEEP || AV_RL32(d+8) == ID_ILBM || AV_RL32(d+8) == ID_RGB8 || AV_RL32(d+8) == ID_ANIM || AV_RL32(d+8) == ID_RGBN)) || (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD)) return AVPROBE_SCORE_MAX; return 0; } static const AVCodecTag dsd_codec_tags[] = { { AV_CODEC_ID_DSD_MSBF, ID_DSD }, { AV_CODEC_ID_DST, ID_DST }, { AV_CODEC_ID_NONE, 0 }, }; #define DSD_SLFT MKTAG('S','L','F','T') #define DSD_SRGT MKTAG('S','R','G','T') #define DSD_MLFT MKTAG('M','L','F','T') #define DSD_MRGT MKTAG('M','R','G','T') #define DSD_C MKTAG('C',' ',' ',' ') #define DSD_LS MKTAG('L','S',' ',' ') #define DSD_RS MKTAG('R','S',' ',' ') #define DSD_LFE MKTAG('L','F','E',' ') static const uint32_t dsd_stereo[] = { DSD_SLFT, DSD_SRGT }; static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS }; static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS }; typedef struct { uint64_t layout; const uint32_t * dsd_layout; } DSDLayoutDesc; static const DSDLayoutDesc dsd_channel_layout[] = { { AV_CH_LAYOUT_STEREO, dsd_stereo }, { AV_CH_LAYOUT_5POINT0, dsd_5point0 }, { AV_CH_LAYOUT_5POINT1, dsd_5point1 }, }; static const uint64_t dsd_loudspeaker_config[] = { AV_CH_LAYOUT_STEREO, 0, 0, AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1, }; static const char * dsd_source_comment[] = { "dsd_source_comment", "analogue_source_comment", "pcm_source_comment", }; static const char * dsd_history_comment[] = { "general_remark", "operator_name", "creating_machine", "timezone", "file_revision" }; static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof) { AVIOContext *pb = s->pb; while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) { uint32_t tag = avio_rl32(pb); uint64_t size = avio_rb64(pb); uint64_t orig_pos = avio_tell(pb); const char * metadata_tag = NULL; if (size >= INT64_MAX) return AVERROR_INVALIDDATA; switch(tag) { case MKTAG('D','I','A','R'): metadata_tag = "artist"; break; case MKTAG('D','I','T','I'): metadata_tag = "title"; break; } if (metadata_tag && size > 4) { unsigned int tag_size = avio_rb32(pb); int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4)); if (ret < 0) { av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); return ret; } } avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1)); } return 0; } static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof) { AVIOContext *pb = s->pb; char abss[24]; int hour, min, sec, i, ret, config; int dsd_layout[6]; ID3v2ExtraMeta *id3v2_extra_meta; while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) { uint32_t tag = avio_rl32(pb); uint64_t size = avio_rb64(pb); uint64_t orig_pos = avio_tell(pb); if (size >= INT64_MAX) return AVERROR_INVALIDDATA; switch(tag) { case MKTAG('A','B','S','S'): if (size < 8) return AVERROR_INVALIDDATA; hour = avio_rb16(pb); min = avio_r8(pb); sec = avio_r8(pb); snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb)); av_dict_set(&st->metadata, "absolute_start_time", abss, 0); break; case MKTAG('C','H','N','L'): if (size < 2) return AVERROR_INVALIDDATA; st->codecpar->channels = avio_rb16(pb); if (size < 2 + st->codecpar->channels * 4) return AVERROR_INVALIDDATA; st->codecpar->channel_layout = 0; if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) { avpriv_request_sample(s, "channel layout"); break; } for (i = 0; i < st->codecpar->channels; i++) dsd_layout[i] = avio_rl32(pb); for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) { const DSDLayoutDesc * d = &dsd_channel_layout[i]; if (av_get_channel_layout_nb_channels(d->layout) == st->codecpar->channels && !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) { st->codecpar->channel_layout = d->layout; break; } } break; case MKTAG('C','M','P','R'): if (size < 4) return AVERROR_INVALIDDATA; st->codecpar->codec_tag = tag = avio_rl32(pb); st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag); if (!st->codecpar->codec_id) { av_log(s, AV_LOG_ERROR, "'%s' compression is not supported\n", av_fourcc2str(tag)); return AVERROR_PATCHWELCOME; } break; case MKTAG('F','S',' ',' '): if (size < 4) return AVERROR_INVALIDDATA; st->codecpar->sample_rate = avio_rb32(pb) / 8; break; case MKTAG('I','D','3',' '): id3v2_extra_meta = NULL; ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size); if (id3v2_extra_meta) { if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0 || (ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0) { ff_id3v2_free_extra_meta(&id3v2_extra_meta); return ret; } ff_id3v2_free_extra_meta(&id3v2_extra_meta); } if (size < avio_tell(pb) - orig_pos) { av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n"); return AVERROR_INVALIDDATA; } break; case MKTAG('L','S','C','O'): if (size < 2) return AVERROR_INVALIDDATA; config = avio_rb16(pb); if (config != 0xFFFF) { if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config)) st->codecpar->channel_layout = dsd_loudspeaker_config[config]; if (!st->codecpar->channel_layout) avpriv_request_sample(s, "loudspeaker configuration %d", config); } break; } avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1)); } return 0; } static int read_dst_frame(AVFormatContext *s, AVPacket *pkt) { IffDemuxContext *iff = s->priv_data; AVIOContext *pb = s->pb; uint32_t chunk_id; uint64_t chunk_pos, data_pos, data_size; int ret = AVERROR_EOF; if (s->nb_streams < 1) return AVERROR_INVALIDDATA; while (!avio_feof(pb)) { chunk_pos = avio_tell(pb); if (chunk_pos >= iff->body_end) return AVERROR_EOF; chunk_id = avio_rl32(pb); data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); data_pos = avio_tell(pb); if (data_size < 1 || data_size >= INT64_MAX) return AVERROR_INVALIDDATA; switch (chunk_id) { case ID_DSTF: if (!pkt) { iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8); iff->body_size = iff->body_end - iff->body_pos; return 0; } ret = av_get_packet(pb, pkt, data_size); if (ret < 0) return ret; if (data_size & 1) avio_skip(pb, 1); pkt->flags |= AV_PKT_FLAG_KEY; pkt->stream_index = 0; pkt->duration = s->streams[0]->codecpar->sample_rate / 75; pkt->pos = chunk_pos; chunk_pos = avio_tell(pb); if (chunk_pos >= iff->body_end) return 0; avio_seek(pb, chunk_pos, SEEK_SET); return 0; case ID_FRTE: if (data_size < 4) return AVERROR_INVALIDDATA; s->streams[0]->duration = avio_rb32(pb) * (uint64_t)s->streams[0]->codecpar->sample_rate / 75; break; } avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1)); } return ret; } static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8}; static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8}; static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8}; static int iff_read_header(AVFormatContext *s) { IffDemuxContext *iff = s->priv_data; AVIOContext *pb = s->pb; AVStream *st; uint8_t *buf; uint32_t chunk_id; uint64_t data_size; uint32_t screenmode = 0, num, den; unsigned transparency = 0; unsigned masking = 0; // no mask uint8_t fmt[16]; int fmt_size; st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codecpar->channels = 1; st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; iff->is_64bit = avio_rl32(pb) == ID_FRM8; avio_skip(pb, iff->is_64bit ? 8 : 4); // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content st->codecpar->codec_tag = avio_rl32(pb); if (st->codecpar->codec_tag == ID_ANIM) { avio_skip(pb, 12); } iff->bitmap_compression = -1; iff->svx8_compression = -1; iff->maud_bits = -1; iff->maud_compression = -1; while(!avio_feof(pb)) { uint64_t orig_pos; int res; const char *metadata_tag = NULL; int version, nb_comments, i; chunk_id = avio_rl32(pb); data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); orig_pos = avio_tell(pb); if (data_size >= INT64_MAX) return AVERROR_INVALIDDATA; switch(chunk_id) { case ID_VHDR: st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; if (data_size < 14) return AVERROR_INVALIDDATA; avio_skip(pb, 12); st->codecpar->sample_rate = avio_rb16(pb); if (data_size >= 16) { avio_skip(pb, 1); iff->svx8_compression = avio_r8(pb); } break; case ID_MHDR: st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; if (data_size < 32) return AVERROR_INVALIDDATA; avio_skip(pb, 4); iff->maud_bits = avio_rb16(pb); avio_skip(pb, 2); num = avio_rb32(pb); den = avio_rb16(pb); if (!den) return AVERROR_INVALIDDATA; avio_skip(pb, 2); st->codecpar->sample_rate = num / den; st->codecpar->channels = avio_rb16(pb); iff->maud_compression = avio_rb16(pb); if (st->codecpar->channels == 1) st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; else if (st->codecpar->channels == 2) st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; break; case ID_ABIT: case ID_BODY: case ID_DBOD: case ID_DSD: case ID_DST: case ID_MDAT: iff->body_pos = avio_tell(pb); if (iff->body_pos < 0 || iff->body_pos + data_size > INT64_MAX) return AVERROR_INVALIDDATA; iff->body_end = iff->body_pos + data_size; iff->body_size = data_size; if (chunk_id == ID_DST) { int ret = read_dst_frame(s, NULL); if (ret < 0) return ret; } break; case ID_CHAN: if (data_size < 4) return AVERROR_INVALIDDATA; if (avio_rb32(pb) < 6) { st->codecpar->channels = 1; st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; } else { st->codecpar->channels = 2; st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; } break; case ID_CAMG: if (data_size < 4) return AVERROR_INVALIDDATA; screenmode = avio_rb32(pb); break; case ID_CMAP: if (data_size < 3 || data_size > 768 || data_size % 3) { av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n", data_size); return AVERROR_INVALIDDATA; } st->codecpar->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE; st->codecpar->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE); if (!st->codecpar->extradata) return AVERROR(ENOMEM); if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) return AVERROR(EIO); break; case ID_BMHD: st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; if (data_size <= 8) return AVERROR_INVALIDDATA; st->codecpar->width = avio_rb16(pb); st->codecpar->height = avio_rb16(pb); avio_skip(pb, 4); // x, y offset st->codecpar->bits_per_coded_sample = avio_r8(pb); if (data_size >= 10) masking = avio_r8(pb); if (data_size >= 11) iff->bitmap_compression = avio_r8(pb); if (data_size >= 14) { avio_skip(pb, 1); // padding transparency = avio_rb16(pb); } if (data_size >= 16) { st->sample_aspect_ratio.num = avio_r8(pb); st->sample_aspect_ratio.den = avio_r8(pb); } break; case ID_ANHD: break; case ID_DPAN: avio_skip(pb, 2); st->duration = avio_rb16(pb); break; case ID_DPEL: if (data_size < 4 || (data_size & 3)) return AVERROR_INVALIDDATA; if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0) return fmt_size; if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24))) st->codecpar->format = AV_PIX_FMT_RGB24; else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba))) st->codecpar->format = AV_PIX_FMT_RGBA; else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra))) st->codecpar->format = AV_PIX_FMT_BGRA; else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb))) st->codecpar->format = AV_PIX_FMT_ARGB; else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr))) st->codecpar->format = AV_PIX_FMT_ABGR; else { avpriv_request_sample(s, "color format %.16s", fmt); return AVERROR_PATCHWELCOME; } break; case ID_DGBL: st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; if (data_size < 8) return AVERROR_INVALIDDATA; st->codecpar->width = avio_rb16(pb); st->codecpar->height = avio_rb16(pb); iff->bitmap_compression = avio_rb16(pb); st->sample_aspect_ratio.num = avio_r8(pb); st->sample_aspect_ratio.den = avio_r8(pb); st->codecpar->bits_per_coded_sample = 24; break; case ID_DLOC: if (data_size < 4) return AVERROR_INVALIDDATA; st->codecpar->width = avio_rb16(pb); st->codecpar->height = avio_rb16(pb); break; case ID_TVDC: if (data_size < sizeof(iff->tvdc)) return AVERROR_INVALIDDATA; res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc)); if (res < 0) return res; break; case ID_ANNO: case ID_TEXT: metadata_tag = "comment"; break; case ID_AUTH: metadata_tag = "artist"; break; case ID_COPYRIGHT: metadata_tag = "copyright"; break; case ID_NAME: metadata_tag = "title"; break; /* DSD tags */ case MKTAG('F','V','E','R'): if (data_size < 4) return AVERROR_INVALIDDATA; version = avio_rb32(pb); av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; break; case MKTAG('D','I','I','N'): res = parse_dsd_diin(s, st, orig_pos + data_size); if (res < 0) return res; break; case MKTAG('P','R','O','P'): if (data_size < 4) return AVERROR_INVALIDDATA; if (avio_rl32(pb) != MKTAG('S','N','D',' ')) { avpriv_request_sample(s, "unknown property type"); break; } res = parse_dsd_prop(s, st, orig_pos + data_size); if (res < 0) return res; break; case MKTAG('C','O','M','T'): if (data_size < 2) return AVERROR_INVALIDDATA; nb_comments = avio_rb16(pb); for (i = 0; i < nb_comments; i++) { int year, mon, day, hour, min, type, ref; char tmp[24]; const char *tag; int metadata_size; year = avio_rb16(pb); mon = avio_r8(pb); day = avio_r8(pb); hour = avio_r8(pb); min = avio_r8(pb); snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min); av_dict_set(&st->metadata, "comment_time", tmp, 0); type = avio_rb16(pb); ref = avio_rb16(pb); switch (type) { case 1: if (!i) tag = "channel_comment"; else { snprintf(tmp, sizeof(tmp), "channel%d_comment", ref); tag = tmp; } break; case 2: tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment"; break; case 3: tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history"; break; default: tag = "comment"; } metadata_size = avio_rb32(pb); if ((res = get_metadata(s, tag, metadata_size)) < 0) { av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag); return res; } if (metadata_size & 1) avio_skip(pb, 1); } break; } if (metadata_tag) { if ((res = get_metadata(s, metadata_tag, data_size)) < 0) { av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); return res; } } avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1)); } if (st->codecpar->codec_tag == ID_ANIM) avio_seek(pb, 12, SEEK_SET); else avio_seek(pb, iff->body_pos, SEEK_SET); switch(st->codecpar->codec_type) { case AVMEDIA_TYPE_AUDIO: avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate); if (st->codecpar->codec_tag == ID_16SV) st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR; else if (st->codecpar->codec_tag == ID_MAUD) { if (iff->maud_bits == 8 && !iff->maud_compression) { st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; } else if (iff->maud_bits == 16 && !iff->maud_compression) { st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; } else if (iff->maud_bits == 8 && iff->maud_compression == 2) { st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; } else if (iff->maud_bits == 8 && iff->maud_compression == 3) { st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; } else { avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits); return AVERROR_PATCHWELCOME; } } else if (st->codecpar->codec_tag != ID_DSD && st->codecpar->codec_tag != ID_DST) { switch (iff->svx8_compression) { case COMP_NONE: st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR; break; case COMP_FIB: st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB; break; case COMP_EXP: st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP; break; default: av_log(s, AV_LOG_ERROR, "Unknown SVX8 compression method '%d'\n", iff->svx8_compression); return -1; } } st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); st->codecpar->bit_rate = (int64_t)st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample; st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample; if ((st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) && st->codecpar->block_align <= 0) return AVERROR_INVALIDDATA; break; case AVMEDIA_TYPE_VIDEO: iff->bpp = st->codecpar->bits_per_coded_sample; if (st->codecpar->codec_tag == ID_ANIM) avpriv_set_pts_info(st, 32, 1, 60); if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) { iff->ham = iff->bpp > 6 ? 6 : 4; st->codecpar->bits_per_coded_sample = 24; } iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8; iff->masking = masking; iff->transparency = transparency; if (!st->codecpar->extradata) { st->codecpar->extradata_size = IFF_EXTRA_VIDEO_SIZE; st->codecpar->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE); if (!st->codecpar->extradata) return AVERROR(ENOMEM); } av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE); buf = st->codecpar->extradata; bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE); bytestream_put_byte(&buf, iff->bitmap_compression); bytestream_put_byte(&buf, iff->bpp); bytestream_put_byte(&buf, iff->ham); bytestream_put_byte(&buf, iff->flags); bytestream_put_be16(&buf, iff->transparency); bytestream_put_byte(&buf, iff->masking); bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc)); st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM; break; default: return -1; } return 0; } static unsigned get_anim_duration(uint8_t *buf, int size) { GetByteContext gb; bytestream2_init(&gb, buf, size); bytestream2_skip(&gb, 4); while (bytestream2_get_bytes_left(&gb) > 8) { unsigned chunk = bytestream2_get_le32(&gb); unsigned size = bytestream2_get_be32(&gb); if (chunk == ID_ANHD) { if (size < 40) break; bytestream2_skip(&gb, 14); return bytestream2_get_be32(&gb); } else { bytestream2_skip(&gb, size + size & 1); } } return 10; } static int iff_read_packet(AVFormatContext *s, AVPacket *pkt) { IffDemuxContext *iff = s->priv_data; AVIOContext *pb = s->pb; AVStream *st = s->streams[0]; int ret; int64_t pos = avio_tell(pb); if (avio_feof(pb)) return AVERROR_EOF; if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end) return AVERROR_EOF; if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) { ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align)); } else if (st->codecpar->codec_tag == ID_DST) { return read_dst_frame(s, pkt); } else { if (iff->body_size > INT_MAX || !iff->body_size) return AVERROR_INVALIDDATA; ret = av_get_packet(pb, pkt, iff->body_size); } } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codecpar->codec_tag == ID_ANIM) { uint64_t data_size, orig_pos; uint32_t chunk_id, chunk_id2; while (!avio_feof(pb)) { if (avio_feof(pb)) return AVERROR_EOF; orig_pos = avio_tell(pb); chunk_id = avio_rl32(pb); data_size = avio_rb32(pb); chunk_id2 = avio_rl32(pb); if (chunk_id == ID_FORM && chunk_id2 == ID_ILBM) { avio_skip(pb, -4); break; } else if (chunk_id == ID_FORM && chunk_id2 == ID_ANIM) { continue; } else { avio_skip(pb, data_size); } } ret = av_get_packet(pb, pkt, data_size); pkt->pos = orig_pos; pkt->duration = get_anim_duration(pkt->data, pkt->size); if (pos == 12) pkt->flags |= AV_PKT_FLAG_KEY; } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codecpar->codec_tag != ID_ANIM) { if (iff->body_size > INT_MAX || !iff->body_size) return AVERROR_INVALIDDATA; ret = av_get_packet(pb, pkt, iff->body_size); pkt->pos = pos; if (pos == iff->body_pos) pkt->flags |= AV_PKT_FLAG_KEY; } else { av_assert0(0); } if (ret < 0) return ret; pkt->stream_index = 0; return ret; } AVInputFormat ff_iff_demuxer = { .name = "iff", .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"), .priv_data_size = sizeof(IffDemuxContext), .read_probe = iff_probe, .read_header = iff_read_header, .read_packet = iff_read_packet, .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK, };