diff options
author | Anton Khirnov <anton@khirnov.net> | 2012-10-16 12:23:29 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2012-10-16 20:52:07 +0400 |
commit | 31c54711cc3f1484af101d629bbb805820d37ad1 (patch) | |
tree | cb45a7db22bcdd094672b3fc84b9ae04608a11ff /libavformat/wavdec.c | |
parent | 58b619c8a226cc4564ad5af291bc99a04f89ee56 (diff) |
lavf: split wav muxer and demuxer into separate files.
Diffstat (limited to 'libavformat/wavdec.c')
-rw-r--r-- | libavformat/wavdec.c | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c new file mode 100644 index 0000000000..bc5288734e --- /dev/null +++ b/libavformat/wavdec.c @@ -0,0 +1,507 @@ +/* + * WAV demuxer + * Copyright (c) 2001, 2002 Fabrice Bellard + * + * Sony Wave64 demuxer + * RF64 demuxer + * Copyright (c) 2009 Daniel Verkamp + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/avassert.h" +#include "libavutil/dict.h" +#include "libavutil/log.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" +#include "avformat.h" +#include "internal.h" +#include "avio_internal.h" +#include "pcm.h" +#include "riff.h" +#include "avio.h" +#include "metadata.h" + +typedef struct WAVDemuxContext { + int64_t data_end; + int w64; +} WAVDemuxContext; + + +#if CONFIG_WAV_DEMUXER + +static int64_t next_tag(AVIOContext *pb, uint32_t *tag) +{ + *tag = avio_rl32(pb); + return avio_rl32(pb); +} + +/* return the size of the found tag */ +static int64_t find_tag(AVIOContext *pb, uint32_t tag1) +{ + unsigned int tag; + int64_t size; + + for (;;) { + if (pb->eof_reached) + return -1; + size = next_tag(pb, &tag); + if (tag == tag1) + break; + avio_skip(pb, size); + } + return size; +} + +static int wav_probe(AVProbeData *p) +{ + /* check file header */ + if (p->buf_size <= 32) + return 0; + if (!memcmp(p->buf + 8, "WAVE", 4)) { + if (!memcmp(p->buf, "RIFF", 4)) + /* + Since ACT demuxer has standard WAV header at top of it's own, + returning score is decreased to avoid probe conflict + between ACT and WAV. + */ + return AVPROBE_SCORE_MAX - 1; + else if (!memcmp(p->buf, "RF64", 4) && + !memcmp(p->buf + 12, "ds64", 4)) + return AVPROBE_SCORE_MAX; + } + return 0; +} + +static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st) +{ + AVIOContext *pb = s->pb; + int ret; + + /* parse fmt header */ + *st = avformat_new_stream(s, NULL); + if (!*st) + return AVERROR(ENOMEM); + + ret = ff_get_wav_header(pb, (*st)->codec, size); + if (ret < 0) + return ret; + (*st)->need_parsing = AVSTREAM_PARSE_FULL; + + avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate); + + return 0; +} + +static inline int wav_parse_bext_string(AVFormatContext *s, const char *key, + int length) +{ + char temp[257]; + int ret; + + av_assert0(length <= sizeof(temp)); + if ((ret = avio_read(s->pb, temp, length)) < 0) + return ret; + + temp[length] = 0; + + if (strlen(temp)) + return av_dict_set(&s->metadata, key, temp, 0); + + return 0; +} + +static int wav_parse_bext_tag(AVFormatContext *s, int64_t size) +{ + char temp[131], *coding_history; + int ret, x; + uint64_t time_reference; + int64_t umid_parts[8], umid_mask = 0; + + if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 || + (ret = wav_parse_bext_string(s, "originator", 32)) < 0 || + (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 || + (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 || + (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0) + return ret; + + time_reference = avio_rl64(s->pb); + snprintf(temp, sizeof(temp), "%"PRIu64, time_reference); + if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0) + return ret; + + /* check if version is >= 1, in which case an UMID may be present */ + if (avio_rl16(s->pb) >= 1) { + for (x = 0; x < 8; x++) + umid_mask |= umid_parts[x] = avio_rb64(s->pb); + + if (umid_mask) { + /* the string formatting below is per SMPTE 330M-2004 Annex C */ + if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) { + /* basic UMID */ + snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, + umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]); + } else { + /* extended UMID */ + snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64 + "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, + umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3], + umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]); + } + + if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0) + return ret; + } + + avio_skip(s->pb, 190); + } else + avio_skip(s->pb, 254); + + if (size > 602) { + /* CodingHistory present */ + size -= 602; + + if (!(coding_history = av_malloc(size+1))) + return AVERROR(ENOMEM); + + if ((ret = avio_read(s->pb, coding_history, size)) < 0) + return ret; + + coding_history[size] = 0; + if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history, + AV_DICT_DONT_STRDUP_VAL)) < 0) + return ret; + } + + return 0; +} + +static const AVMetadataConv wav_metadata_conv[] = { + {"description", "comment" }, + {"originator", "encoded_by" }, + {"origination_date", "date" }, + {"origination_time", "creation_time"}, + {0}, +}; + +/* wav input */ +static int wav_read_header(AVFormatContext *s) +{ + int64_t size, av_uninit(data_size); + int64_t sample_count=0; + int rf64; + uint32_t tag, list_type; + AVIOContext *pb = s->pb; + AVStream *st = NULL; + WAVDemuxContext *wav = s->priv_data; + int ret, got_fmt = 0; + int64_t next_tag_ofs, data_ofs = -1; + + /* check RIFF header */ + tag = avio_rl32(pb); + + rf64 = tag == MKTAG('R', 'F', '6', '4'); + if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F')) + return -1; + avio_rl32(pb); /* file size */ + tag = avio_rl32(pb); + if (tag != MKTAG('W', 'A', 'V', 'E')) + return -1; + + if (rf64) { + if (avio_rl32(pb) != MKTAG('d', 's', '6', '4')) + return -1; + size = avio_rl32(pb); + if (size < 16) + return -1; + avio_rl64(pb); /* RIFF size */ + data_size = avio_rl64(pb); + sample_count = avio_rl64(pb); + if (data_size < 0 || sample_count < 0) { + av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in " + "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n", + data_size, sample_count); + return AVERROR_INVALIDDATA; + } + avio_skip(pb, size - 16); /* skip rest of ds64 chunk */ + } + + for (;;) { + size = next_tag(pb, &tag); + next_tag_ofs = avio_tell(pb) + size; + + if (pb->eof_reached) + break; + + switch (tag) { + case MKTAG('f', 'm', 't', ' '): + /* only parse the first 'fmt ' tag found */ + if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) { + return ret; + } else if (got_fmt) + av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n"); + + got_fmt = 1; + break; + case MKTAG('d', 'a', 't', 'a'): + if (!got_fmt) { + av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n"); + return AVERROR_INVALIDDATA; + } + + if (rf64) { + next_tag_ofs = wav->data_end = avio_tell(pb) + data_size; + } else { + data_size = size; + next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX; + } + + data_ofs = avio_tell(pb); + + /* don't look for footer metadata if we can't seek or if we don't + * know where the data tag ends + */ + if (!pb->seekable || (!rf64 && !size)) + goto break_loop; + break; + case MKTAG('f','a','c','t'): + if (!sample_count) + sample_count = avio_rl32(pb); + break; + case MKTAG('b','e','x','t'): + if ((ret = wav_parse_bext_tag(s, size)) < 0) + return ret; + break; + case MKTAG('L', 'I', 'S', 'T'): + list_type = avio_rl32(pb); + if (size <= 4) { + av_log(s, AV_LOG_ERROR, "too short LIST"); + return AVERROR_INVALIDDATA; + } + switch (list_type) { + case MKTAG('I', 'N', 'F', 'O'): + if ((ret = ff_read_riff_info(s, size - 4)) < 0) + return ret; + } + break; + } + + /* seek to next tag unless we know that we'll run into EOF */ + if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) || + avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) { + break; + } + } +break_loop: + if (data_ofs < 0) { + av_log(s, AV_LOG_ERROR, "no 'data' tag found\n"); + return AVERROR_INVALIDDATA; + } + + avio_seek(pb, data_ofs, SEEK_SET); + + if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id)) + sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id)); + if (sample_count) + st->duration = sample_count; + + ff_metadata_conv_ctx(s, NULL, wav_metadata_conv); + ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); + + return 0; +} + +/** Find chunk with w64 GUID by skipping over other chunks + * @return the size of the found chunk + */ +static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16]) +{ + uint8_t guid[16]; + int64_t size; + + while (!pb->eof_reached) { + avio_read(pb, guid, 16); + size = avio_rl64(pb); + if (size <= 24) + return -1; + if (!memcmp(guid, guid1, 16)) + return size; + avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24); + } + return -1; +} + +static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a', + 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; + +#define MAX_SIZE 4096 + +static int wav_read_packet(AVFormatContext *s, + AVPacket *pkt) +{ + int ret, size; + int64_t left; + AVStream *st; + WAVDemuxContext *wav = s->priv_data; + + st = s->streams[0]; + + left = wav->data_end - avio_tell(s->pb); + if (left <= 0){ + if (CONFIG_W64_DEMUXER && wav->w64) + left = find_guid(s->pb, guid_data) - 24; + else + left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a')); + if (left < 0) + return AVERROR_EOF; + wav->data_end= avio_tell(s->pb) + left; + } + + size = MAX_SIZE; + if (st->codec->block_align > 1) { + if (size < st->codec->block_align) + size = st->codec->block_align; + size = (size / st->codec->block_align) * st->codec->block_align; + } + size = FFMIN(size, left); + ret = av_get_packet(s->pb, pkt, size); + if (ret < 0) + return ret; + pkt->stream_index = 0; + + return ret; +} + +static int wav_read_seek(AVFormatContext *s, + int stream_index, int64_t timestamp, int flags) +{ + AVStream *st; + + st = s->streams[0]; + switch (st->codec->codec_id) { + case AV_CODEC_ID_MP2: + case AV_CODEC_ID_MP3: + case AV_CODEC_ID_AC3: + case AV_CODEC_ID_DTS: + /* use generic seeking with dynamically generated indexes */ + return -1; + default: + break; + } + return ff_pcm_read_seek(s, stream_index, timestamp, flags); +} + +AVInputFormat ff_wav_demuxer = { + .name = "wav", + .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"), + .priv_data_size = sizeof(WAVDemuxContext), + .read_probe = wav_probe, + .read_header = wav_read_header, + .read_packet = wav_read_packet, + .read_seek = wav_read_seek, + .flags = AVFMT_GENERIC_INDEX, + .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 }, +}; +#endif /* CONFIG_WAV_DEMUXER */ + + +#if CONFIG_W64_DEMUXER +static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f', + 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 }; + +static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e', + 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; + +static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ', + 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; + +static int w64_probe(AVProbeData *p) +{ + if (p->buf_size <= 40) + return 0; + if (!memcmp(p->buf, guid_riff, 16) && + !memcmp(p->buf + 24, guid_wave, 16)) + return AVPROBE_SCORE_MAX; + else + return 0; +} + +static int w64_read_header(AVFormatContext *s) +{ + int64_t size; + AVIOContext *pb = s->pb; + WAVDemuxContext *wav = s->priv_data; + AVStream *st; + uint8_t guid[16]; + int ret; + + avio_read(pb, guid, 16); + if (memcmp(guid, guid_riff, 16)) + return -1; + + if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */ + return -1; + + avio_read(pb, guid, 16); + if (memcmp(guid, guid_wave, 16)) { + av_log(s, AV_LOG_ERROR, "could not find wave guid\n"); + return -1; + } + + size = find_guid(pb, guid_fmt); + if (size < 0) { + av_log(s, AV_LOG_ERROR, "could not find fmt guid\n"); + return -1; + } + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + /* subtract chunk header size - normal wav file doesn't count it */ + ret = ff_get_wav_header(pb, st->codec, size - 24); + if (ret < 0) + return ret; + avio_skip(pb, FFALIGN(size, INT64_C(8)) - size); + + st->need_parsing = AVSTREAM_PARSE_FULL; + + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); + + size = find_guid(pb, guid_data); + if (size < 0) { + av_log(s, AV_LOG_ERROR, "could not find data guid\n"); + return -1; + } + wav->data_end = avio_tell(pb) + size - 24; + wav->w64 = 1; + + return 0; +} + +AVInputFormat ff_w64_demuxer = { + .name = "w64", + .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"), + .priv_data_size = sizeof(WAVDemuxContext), + .read_probe = w64_probe, + .read_header = w64_read_header, + .read_packet = wav_read_packet, + .read_seek = wav_read_seek, + .flags = AVFMT_GENERIC_INDEX, + .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 }, +}; +#endif /* CONFIG_W64_DEMUXER */ |