| /* | |
| * WAV muxer | |
| * Copyright (c) 2001, 2002 Fabrice Bellard | |
| * | |
| * Sony Wave64 muxer | |
| * Copyright (c) 2012 Paul B Mahol | |
| * | |
| * WAV muxer RF64 support | |
| * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu> | |
| * | |
| * EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder | |
| * Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at> | |
| * | |
| * 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 | |
| */ | |
| #include "config_components.h" | |
| #include <stdint.h> | |
| #include <string.h> | |
| #include <time.h> | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/dict.h" | |
| #include "libavutil/common.h" | |
| #include "libavutil/intreadwrite.h" | |
| #include "libavutil/mathematics.h" | |
| #include "libavutil/opt.h" | |
| #include "libavutil/time.h" | |
| #include "libavutil/time_internal.h" | |
| #include "avformat.h" | |
| #include "avio.h" | |
| #include "avio_internal.h" | |
| #include "internal.h" | |
| #include "mux.h" | |
| #include "riff.h" | |
| #define RF64_AUTO (-1) | |
| #define RF64_NEVER 0 | |
| #define RF64_ALWAYS 1 | |
| typedef enum { | |
| PEAK_OFF = 0, | |
| PEAK_ON, | |
| PEAK_ONLY | |
| } PeakType; | |
| typedef enum { | |
| PEAK_FORMAT_UINT8 = 1, | |
| PEAK_FORMAT_UINT16 | |
| } PeakFormat; | |
| typedef struct WAVMuxContext { | |
| const AVClass *class; | |
| int64_t data; | |
| int64_t fact_pos; | |
| int64_t ds64; | |
| int64_t minpts; | |
| int64_t maxpts; | |
| int16_t *peak_maxpos, *peak_maxneg; | |
| uint32_t peak_num_frames; | |
| unsigned peak_outbuf_size; | |
| uint32_t peak_outbuf_bytes; | |
| unsigned size_increment; | |
| uint8_t *peak_output; | |
| int last_duration; | |
| int write_bext; | |
| int write_peak; | |
| int rf64; | |
| int peak_block_size; | |
| int peak_format; | |
| int peak_block_pos; | |
| int peak_ppv; | |
| int peak_bps; | |
| } WAVMuxContext; | |
| #if CONFIG_WAV_MUXER | |
| static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen) | |
| { | |
| AVDictionaryEntry *tag; | |
| size_t len = 0; | |
| if (tag = av_dict_get(s->metadata, key, NULL, 0)) { | |
| len = strlen(tag->value); | |
| len = FFMIN(len, maxlen); | |
| avio_write(s->pb, tag->value, len); | |
| } | |
| ffio_fill(s->pb, 0, maxlen - len); | |
| } | |
| static void bwf_write_bext_chunk(AVFormatContext *s) | |
| { | |
| AVDictionaryEntry *tmp_tag; | |
| uint64_t time_reference = 0; | |
| int64_t bext = ff_start_tag(s->pb, "bext"); | |
| bwf_write_bext_string(s, "description", 256); | |
| bwf_write_bext_string(s, "originator", 32); | |
| bwf_write_bext_string(s, "originator_reference", 32); | |
| bwf_write_bext_string(s, "origination_date", 10); | |
| bwf_write_bext_string(s, "origination_time", 8); | |
| if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0)) | |
| time_reference = strtoll(tmp_tag->value, NULL, 10); | |
| avio_wl64(s->pb, time_reference); | |
| avio_wl16(s->pb, 1); // set version to 1 | |
| if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) { | |
| unsigned char umidpart_str[17] = {0}; | |
| int64_t i; | |
| uint64_t umidpart; | |
| size_t len = strlen(tmp_tag->value+2); | |
| for (i = 0; i < len/16; i++) { | |
| memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16); | |
| umidpart = strtoull(umidpart_str, NULL, 16); | |
| avio_wb64(s->pb, umidpart); | |
| } | |
| ffio_fill(s->pb, 0, 64 - i*8); | |
| } else | |
| ffio_fill(s->pb, 0, 64); // zero UMID | |
| ffio_fill(s->pb, 0, 190); // Reserved | |
| if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0)) | |
| avio_put_str(s->pb, tmp_tag->value); | |
| ff_end_tag(s->pb, bext); | |
| } | |
| static av_cold void wav_deinit(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| av_freep(&wav->peak_maxpos); | |
| av_freep(&wav->peak_maxneg); | |
| av_freep(&wav->peak_output); | |
| } | |
| static av_cold int peak_init_writer(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| AVCodecParameters *par = s->streams[0]->codecpar; | |
| if (par->codec_id != AV_CODEC_ID_PCM_S8 && | |
| par->codec_id != AV_CODEC_ID_PCM_S16LE && | |
| par->codec_id != AV_CODEC_ID_PCM_U8 && | |
| par->codec_id != AV_CODEC_ID_PCM_U16LE) { | |
| av_log(s, AV_LOG_ERROR, "Codec %s not supported for Peak Chunk\n", | |
| avcodec_get_name(par->codec_id)); | |
| return -1; | |
| } | |
| wav->peak_bps = av_get_bits_per_sample(par->codec_id) / 8; | |
| if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) { | |
| av_log(s, AV_LOG_ERROR, | |
| "Writing 16 bit peak for 8 bit audio does not make sense\n"); | |
| return AVERROR(EINVAL); | |
| } | |
| if (par->ch_layout.nb_channels > INT_MAX / (wav->peak_bps * wav->peak_ppv)) | |
| return AVERROR(ERANGE); | |
| wav->size_increment = par->ch_layout.nb_channels * wav->peak_bps * wav->peak_ppv; | |
| wav->peak_maxpos = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxpos)); | |
| wav->peak_maxneg = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxneg)); | |
| if (!wav->peak_maxpos || !wav->peak_maxneg) | |
| goto nomem; | |
| return 0; | |
| nomem: | |
| av_log(s, AV_LOG_ERROR, "Out of memory\n"); | |
| return AVERROR(ENOMEM); | |
| } | |
| static int peak_write_frame(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| AVCodecParameters *par = s->streams[0]->codecpar; | |
| unsigned new_size = wav->peak_outbuf_bytes + wav->size_increment; | |
| uint8_t *tmp; | |
| int c; | |
| if (new_size > INT_MAX) { | |
| wav->write_peak = PEAK_OFF; | |
| return AVERROR(ERANGE); | |
| } | |
| tmp = av_fast_realloc(wav->peak_output, &wav->peak_outbuf_size, new_size); | |
| if (!tmp) { | |
| wav->write_peak = PEAK_OFF; | |
| return AVERROR(ENOMEM); | |
| } | |
| wav->peak_output = tmp; | |
| for (c = 0; c < par->ch_layout.nb_channels; c++) { | |
| wav->peak_maxneg[c] = -wav->peak_maxneg[c]; | |
| if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) { | |
| wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256; | |
| wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256; | |
| } | |
| if (wav->peak_ppv == 1) | |
| wav->peak_maxpos[c] = | |
| FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]); | |
| if (wav->peak_format == PEAK_FORMAT_UINT8) { | |
| wav->peak_output[wav->peak_outbuf_bytes++] = | |
| wav->peak_maxpos[c]; | |
| if (wav->peak_ppv == 2) { | |
| wav->peak_output[wav->peak_outbuf_bytes++] = | |
| wav->peak_maxneg[c]; | |
| } | |
| } else { | |
| AV_WL16(wav->peak_output + wav->peak_outbuf_bytes, | |
| wav->peak_maxpos[c]); | |
| wav->peak_outbuf_bytes += 2; | |
| if (wav->peak_ppv == 2) { | |
| AV_WL16(wav->peak_output + wav->peak_outbuf_bytes, | |
| wav->peak_maxneg[c]); | |
| wav->peak_outbuf_bytes += 2; | |
| } | |
| } | |
| wav->peak_maxpos[c] = 0; | |
| wav->peak_maxneg[c] = 0; | |
| } | |
| wav->peak_num_frames++; | |
| return 0; | |
| } | |
| static int peak_write_chunk(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| AVIOContext *pb = s->pb; | |
| AVCodecParameters *par = s->streams[0]->codecpar; | |
| int64_t peak = ff_start_tag(s->pb, "levl"); | |
| int64_t now0; | |
| time_t now_secs; | |
| char timestamp[28]; | |
| /* Peak frame of incomplete block at end */ | |
| if (wav->peak_block_pos) { | |
| int ret = peak_write_frame(s); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| memset(timestamp, 0, sizeof(timestamp)); | |
| if (!(s->flags & AVFMT_FLAG_BITEXACT)) { | |
| struct tm tmpbuf; | |
| av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n"); | |
| now0 = av_gettime(); | |
| now_secs = now0 / 1000000; | |
| if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) { | |
| av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000)); | |
| } else { | |
| av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n"); | |
| return -1; | |
| } | |
| } | |
| avio_wl32(pb, 1); /* version */ | |
| avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */ | |
| avio_wl32(pb, wav->peak_ppv); /* positive and negative */ | |
| avio_wl32(pb, wav->peak_block_size); /* frames per value */ | |
| avio_wl32(pb, par->ch_layout.nb_channels); /* number of channels */ | |
| avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */ | |
| avio_wl32(pb, -1); /* audio sample frame position (not implemented) */ | |
| avio_wl32(pb, 128); /* equal to size of header */ | |
| avio_write(pb, timestamp, 28); /* ASCII time stamp */ | |
| ffio_fill(pb, 0, 60); | |
| avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes); | |
| ff_end_tag(pb, peak); | |
| if (!wav->data) | |
| wav->data = peak; | |
| return 0; | |
| } | |
| static int wav_write_header(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| AVIOContext *pb = s->pb; | |
| int64_t fmt; | |
| if (wav->rf64 == RF64_ALWAYS) { | |
| ffio_wfourcc(pb, "RF64"); | |
| avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */ | |
| } else { | |
| ffio_wfourcc(pb, "RIFF"); | |
| avio_wl32(pb, -1); /* file length */ | |
| } | |
| ffio_wfourcc(pb, "WAVE"); | |
| if (wav->rf64 != RF64_NEVER) { | |
| /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */ | |
| ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK"); | |
| avio_wl32(pb, 28); /* chunk size */ | |
| wav->ds64 = avio_tell(pb); | |
| ffio_fill(pb, 0, 28); | |
| } | |
| if (wav->write_peak != PEAK_ONLY) { | |
| /* format header */ | |
| fmt = ff_start_tag(pb, "fmt "); | |
| if (ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0) < 0) { | |
| av_log(s, AV_LOG_ERROR, "Codec %s not supported in WAVE format\n", | |
| avcodec_get_name(s->streams[0]->codecpar->codec_id)); | |
| return AVERROR(ENOSYS); | |
| } | |
| ff_end_tag(pb, fmt); | |
| } | |
| if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */ | |
| && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) { | |
| wav->fact_pos = ff_start_tag(pb, "fact"); | |
| avio_wl32(pb, 0); | |
| ff_end_tag(pb, wav->fact_pos); | |
| } | |
| if (wav->write_bext) | |
| bwf_write_bext_chunk(s); | |
| if (wav->write_peak) { | |
| int ret; | |
| if ((ret = peak_init_writer(s)) < 0) | |
| return ret; | |
| } | |
| avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate); | |
| wav->maxpts = wav->last_duration = 0; | |
| wav->minpts = INT64_MAX; | |
| if (wav->write_peak != PEAK_ONLY) { | |
| /* info header */ | |
| ff_riff_write_info(s); | |
| /* data header */ | |
| wav->data = ff_start_tag(pb, "data"); | |
| } | |
| return 0; | |
| } | |
| static int wav_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| { | |
| AVIOContext *pb = s->pb; | |
| WAVMuxContext *wav = s->priv_data; | |
| if (wav->write_peak != PEAK_ONLY) | |
| avio_write(pb, pkt->data, pkt->size); | |
| if (wav->write_peak) { | |
| int c = 0; | |
| int i; | |
| for (i = 0; i < pkt->size; i += wav->peak_bps) { | |
| if (wav->peak_bps == 1) { | |
| wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i)); | |
| wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i)); | |
| } else { | |
| wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i)); | |
| wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i)); | |
| } | |
| if (++c == s->streams[0]->codecpar->ch_layout.nb_channels) { | |
| c = 0; | |
| if (++wav->peak_block_pos == wav->peak_block_size) { | |
| int ret = peak_write_frame(s); | |
| if (ret < 0) | |
| return ret; | |
| wav->peak_block_pos = 0; | |
| } | |
| } | |
| } | |
| } | |
| if(pkt->pts != AV_NOPTS_VALUE) { | |
| wav->minpts = FFMIN(wav->minpts, pkt->pts); | |
| wav->maxpts = FFMAX(wav->maxpts, pkt->pts); | |
| wav->last_duration = pkt->duration; | |
| } else | |
| av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n"); | |
| return 0; | |
| } | |
| static int wav_write_trailer(AVFormatContext *s) | |
| { | |
| AVIOContext *pb = s->pb; | |
| WAVMuxContext *wav = s->priv_data; | |
| int64_t file_size, data_size; | |
| int64_t number_of_samples = 0; | |
| int rf64 = 0; | |
| int ret = 0; | |
| if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) { | |
| if (wav->write_peak != PEAK_ONLY && avio_tell(pb) - wav->data < UINT32_MAX) { | |
| ff_end_tag(pb, wav->data); | |
| } | |
| if (wav->write_peak && wav->peak_output) { | |
| ret = peak_write_chunk(s); | |
| } | |
| /* update file size */ | |
| file_size = avio_tell(pb); | |
| data_size = file_size - wav->data; | |
| if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) { | |
| rf64 = 1; | |
| } else if (file_size - 8 <= UINT32_MAX) { | |
| avio_seek(pb, 4, SEEK_SET); | |
| avio_wl32(pb, (uint32_t)(file_size - 8)); | |
| avio_seek(pb, file_size, SEEK_SET); | |
| } else { | |
| av_log(s, AV_LOG_ERROR, | |
| "Filesize %"PRId64" invalid for wav, output file will be broken\n", | |
| file_size); | |
| } | |
| number_of_samples = av_rescale_q(wav->maxpts - wav->minpts + wav->last_duration, | |
| s->streams[0]->time_base, | |
| av_make_q(1, s->streams[0]->codecpar->sample_rate)); | |
| if(s->streams[0]->codecpar->codec_tag != 0x01) { | |
| /* Update num_samps in fact chunk */ | |
| avio_seek(pb, wav->fact_pos, SEEK_SET); | |
| if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) { | |
| rf64 = 1; | |
| avio_wl32(pb, -1); | |
| } else { | |
| avio_wl32(pb, number_of_samples); | |
| avio_seek(pb, file_size, SEEK_SET); | |
| } | |
| } | |
| if (rf64) { | |
| /* overwrite RIFF with RF64 */ | |
| avio_seek(pb, 0, SEEK_SET); | |
| ffio_wfourcc(pb, "RF64"); | |
| avio_wl32(pb, -1); | |
| /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */ | |
| avio_seek(pb, wav->ds64 - 8, SEEK_SET); | |
| ffio_wfourcc(pb, "ds64"); | |
| avio_wl32(pb, 28); /* ds64 chunk size */ | |
| avio_wl64(pb, file_size - 8); /* RF64 chunk size */ | |
| avio_wl64(pb, data_size); /* data chunk size */ | |
| avio_wl64(pb, number_of_samples); /* fact chunk number of samples */ | |
| avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */ | |
| /* write -1 in data chunk size */ | |
| avio_seek(pb, wav->data - 4, SEEK_SET); | |
| avio_wl32(pb, -1); | |
| avio_seek(pb, file_size, SEEK_SET); | |
| } | |
| } | |
| return ret; | |
| } | |
| #define OFFSET(x) offsetof(WAVMuxContext, x) | |
| #define ENC AV_OPT_FLAG_ENCODING_PARAM | |
| static const AVOption options[] = { | |
| { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC }, | |
| { "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, .unit = "peak" }, | |
| { "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, .unit = "peak" }, | |
| { "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, .unit = "peak" }, | |
| { "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, .unit = "peak" }, | |
| { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, .unit = "rf64" }, | |
| { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, .unit = "rf64" }, | |
| { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, .unit = "rf64" }, | |
| { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, .unit = "rf64" }, | |
| { "peak_block_size", "Number of audio samples used to generate each peak frame.", OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC }, | |
| { "peak_format", "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT, { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC }, | |
| { "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC }, | |
| { NULL }, | |
| }; | |
| static const AVClass wav_muxer_class = { | |
| .class_name = "WAV muxer", | |
| .item_name = av_default_item_name, | |
| .option = options, | |
| .version = LIBAVUTIL_VERSION_INT, | |
| }; | |
| const FFOutputFormat ff_wav_muxer = { | |
| .p.name = "wav", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"), | |
| .p.mime_type = "audio/x-wav", | |
| .p.extensions = "wav", | |
| .priv_data_size = sizeof(WAVMuxContext), | |
| .p.audio_codec = AV_CODEC_ID_PCM_S16LE, | |
| .p.video_codec = AV_CODEC_ID_NONE, | |
| .p.subtitle_codec = AV_CODEC_ID_NONE, | |
| .write_header = wav_write_header, | |
| .write_packet = wav_write_packet, | |
| .write_trailer = wav_write_trailer, | |
| .deinit = wav_deinit, | |
| .p.flags = AVFMT_TS_NONSTRICT, | |
| .p.codec_tag = ff_wav_codec_tags_list, | |
| .p.priv_class = &wav_muxer_class, | |
| .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | |
| }; | |
| #endif /* CONFIG_WAV_MUXER */ | |
| #if CONFIG_W64_MUXER | |
| #include "w64.h" | |
| static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos) | |
| { | |
| *pos = avio_tell(pb); | |
| avio_write(pb, guid, 16); | |
| avio_wl64(pb, INT64_MAX); | |
| } | |
| static void end_guid(AVIOContext *pb, int64_t start) | |
| { | |
| int64_t end, pos = avio_tell(pb); | |
| end = FFALIGN(pos, 8); | |
| ffio_fill(pb, 0, end - pos); | |
| avio_seek(pb, start + 16, SEEK_SET); | |
| avio_wl64(pb, end - start); | |
| avio_seek(pb, end, SEEK_SET); | |
| } | |
| static int w64_write_header(AVFormatContext *s) | |
| { | |
| WAVMuxContext *wav = s->priv_data; | |
| AVIOContext *pb = s->pb; | |
| int64_t start; | |
| int ret; | |
| avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff)); | |
| avio_wl64(pb, -1); | |
| avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave)); | |
| start_guid(pb, ff_w64_guid_fmt, &start); | |
| if ((ret = ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0)) < 0) { | |
| av_log(s, AV_LOG_ERROR, "Codec %s not supported\n", | |
| avcodec_get_name(s->streams[0]->codecpar->codec_id)); | |
| return ret; | |
| } | |
| end_guid(pb, start); | |
| if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */ | |
| && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) { | |
| start_guid(pb, ff_w64_guid_fact, &wav->fact_pos); | |
| avio_wl64(pb, 0); | |
| end_guid(pb, wav->fact_pos); | |
| } | |
| start_guid(pb, ff_w64_guid_data, &wav->data); | |
| return 0; | |
| } | |
| static int w64_write_trailer(AVFormatContext *s) | |
| { | |
| AVIOContext *pb = s->pb; | |
| WAVMuxContext *wav = s->priv_data; | |
| int64_t file_size; | |
| if (pb->seekable & AVIO_SEEKABLE_NORMAL) { | |
| end_guid(pb, wav->data); | |
| file_size = avio_tell(pb); | |
| avio_seek(pb, 16, SEEK_SET); | |
| avio_wl64(pb, file_size); | |
| if (s->streams[0]->codecpar->codec_tag != 0x01) { | |
| int64_t number_of_samples; | |
| number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration, | |
| s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num, | |
| s->streams[0]->time_base.den); | |
| avio_seek(pb, wav->fact_pos + 24, SEEK_SET); | |
| avio_wl64(pb, number_of_samples); | |
| } | |
| avio_seek(pb, file_size, SEEK_SET); | |
| } | |
| return 0; | |
| } | |
| const FFOutputFormat ff_w64_muxer = { | |
| .p.name = "w64", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"), | |
| .p.extensions = "w64", | |
| .priv_data_size = sizeof(WAVMuxContext), | |
| .p.audio_codec = AV_CODEC_ID_PCM_S16LE, | |
| .p.video_codec = AV_CODEC_ID_NONE, | |
| .p.subtitle_codec = AV_CODEC_ID_NONE, | |
| .write_header = w64_write_header, | |
| .write_packet = wav_write_packet, | |
| .write_trailer = w64_write_trailer, | |
| .p.flags = AVFMT_TS_NONSTRICT, | |
| .p.codec_tag = ff_wav_codec_tags_list, | |
| .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | |
| }; | |
| #endif /* CONFIG_W64_MUXER */ |