| /* |
| * 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 <stdint.h> |
| #include <string.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 "riff.h" |
| |
| #define RF64_AUTO (-1) |
| #define RF64_NEVER 0 |
| #define RF64_ALWAYS 1 |
| |
| #define PEAK_BUFFER_SIZE 1024 |
| |
| 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; |
| uint32_t peak_outbuf_size; |
| uint32_t peak_outbuf_bytes; |
| uint32_t peak_pos_pop; |
| uint16_t peak_pop; |
| 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 = strtoll(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 peak_free_buffers(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; |
| AVCodecContext *enc = s->streams[0]->codec; |
| |
| if (enc->codec_id != AV_CODEC_ID_PCM_S8 && |
| enc->codec_id != AV_CODEC_ID_PCM_S16LE && |
| enc->codec_id != AV_CODEC_ID_PCM_U8 && |
| enc->codec_id != AV_CODEC_ID_PCM_U16LE) { |
| av_log(s, AV_LOG_ERROR, "%s codec not supported for Peak Chunk\n", |
| s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE"); |
| return -1; |
| } |
| |
| wav->peak_bps = av_get_bits_per_sample(enc->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); |
| } |
| |
| wav->peak_maxpos = av_mallocz_array(enc->channels, sizeof(*wav->peak_maxpos)); |
| wav->peak_maxneg = av_mallocz_array(enc->channels, sizeof(*wav->peak_maxneg)); |
| wav->peak_output = av_malloc(PEAK_BUFFER_SIZE); |
| if (!wav->peak_maxpos || !wav->peak_maxneg || !wav->peak_output) |
| goto nomem; |
| |
| wav->peak_outbuf_size = PEAK_BUFFER_SIZE; |
| |
| return 0; |
| |
| nomem: |
| av_log(s, AV_LOG_ERROR, "Out of memory\n"); |
| peak_free_buffers(s); |
| return AVERROR(ENOMEM); |
| } |
| |
| static void peak_write_frame(AVFormatContext *s) |
| { |
| WAVMuxContext *wav = s->priv_data; |
| AVCodecContext *enc = s->streams[0]->codec; |
| int peak_of_peaks; |
| int c; |
| |
| if (!wav->peak_output) |
| return; |
| |
| for (c = 0; c < enc->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]); |
| |
| peak_of_peaks = FFMAX3(wav->peak_maxpos[c], wav->peak_maxneg[c], |
| wav->peak_pop); |
| if (peak_of_peaks > wav->peak_pop) |
| wav->peak_pos_pop = wav->peak_num_frames; |
| wav->peak_pop = peak_of_peaks; |
| |
| if (wav->peak_outbuf_size - wav->peak_outbuf_bytes < |
| wav->peak_format * wav->peak_ppv) { |
| wav->peak_outbuf_size += PEAK_BUFFER_SIZE; |
| wav->peak_output = av_realloc(wav->peak_output, |
| wav->peak_outbuf_size); |
| if (!wav->peak_output) { |
| av_log(s, AV_LOG_ERROR, "No memory for peak data\n"); |
| return; |
| } |
| } |
| |
| 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++; |
| } |
| |
| static int peak_write_chunk(AVFormatContext *s) |
| { |
| WAVMuxContext *wav = s->priv_data; |
| AVIOContext *pb = s->pb; |
| AVCodecContext *enc = s->streams[0]->codec; |
| 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) |
| peak_write_frame(s); |
| |
| 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, enc->channels); /* number of channels */ |
| avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */ |
| avio_wl32(pb, wav->peak_pos_pop); /* audio sample frame index */ |
| 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 (s->nb_streams != 1) { |
| av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| 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 != 2) { |
| /* format header */ |
| fmt = ff_start_tag(pb, "fmt "); |
| if (ff_put_wav_header(pb, s->streams[0]->codec, 0) < 0) { |
| const AVCodecDescriptor *desc = avcodec_descriptor_get(s->streams[0]->codec->codec_id); |
| av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n", |
| desc ? desc->name : "unknown"); |
| return AVERROR(ENOSYS); |
| } |
| ff_end_tag(pb, fmt); |
| } |
| |
| if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */ |
| && s->pb->seekable) { |
| 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]->codec->sample_rate); |
| wav->maxpts = wav->last_duration = 0; |
| wav->minpts = INT64_MAX; |
| |
| if (wav->write_peak != 2) { |
| /* info header */ |
| ff_riff_write_info(s); |
| |
| /* data header */ |
| wav->data = ff_start_tag(pb, "data"); |
| } |
| |
| avio_flush(pb); |
| |
| return 0; |
| } |
| |
| static int wav_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVIOContext *pb = s->pb; |
| WAVMuxContext *wav = s->priv_data; |
| |
| if (wav->write_peak != 2) |
| 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]->codec->channels) { |
| c = 0; |
| if (++wav->peak_block_pos == wav->peak_block_size) { |
| peak_write_frame(s); |
| 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; |
| |
| avio_flush(pb); |
| |
| if (s->pb->seekable) { |
| if (wav->write_peak != 2 && avio_tell(pb) - wav->data < UINT32_MAX) { |
| ff_end_tag(pb, wav->data); |
| avio_flush(pb); |
| } |
| |
| if (wav->write_peak && wav->peak_output) { |
| ret = peak_write_chunk(s); |
| avio_flush(pb); |
| } |
| |
| /* 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); |
| |
| avio_flush(pb); |
| } 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(wav->maxpts - wav->minpts + wav->last_duration, |
| s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num, |
| s->streams[0]->time_base.den); |
| |
| if(s->streams[0]->codec->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); |
| avio_flush(pb); |
| } |
| } |
| |
| 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); |
| avio_flush(pb); |
| } |
| } |
| |
| if (wav->write_peak) |
| peak_free_buffers(s); |
| |
| 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, "peak" }, |
| { "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" }, |
| { "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" }, |
| { "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" }, |
| { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" }, |
| { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" }, |
| { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" }, |
| { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "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, |
| }; |
| |
| AVOutputFormat ff_wav_muxer = { |
| .name = "wav", |
| .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"), |
| .mime_type = "audio/x-wav", |
| .extensions = "wav", |
| .priv_data_size = sizeof(WAVMuxContext), |
| .audio_codec = AV_CODEC_ID_PCM_S16LE, |
| .video_codec = AV_CODEC_ID_NONE, |
| .write_header = wav_write_header, |
| .write_packet = wav_write_packet, |
| .write_trailer = wav_write_trailer, |
| .flags = AVFMT_TS_NONSTRICT, |
| .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 }, |
| .priv_class = &wav_muxer_class, |
| }; |
| #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(pb, s->streams[0]->codec, 0)) < 0) { |
| av_log(s, AV_LOG_ERROR, "%s codec not supported\n", |
| s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE"); |
| return ret; |
| } |
| end_guid(pb, start); |
| |
| if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */ |
| && s->pb->seekable) { |
| 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) { |
| 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]->codec->codec_tag != 0x01) { |
| int64_t number_of_samples; |
| |
| number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration, |
| s->streams[0]->codec->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); |
| avio_flush(pb); |
| } |
| |
| return 0; |
| } |
| |
| AVOutputFormat ff_w64_muxer = { |
| .name = "w64", |
| .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"), |
| .extensions = "w64", |
| .priv_data_size = sizeof(WAVMuxContext), |
| .audio_codec = AV_CODEC_ID_PCM_S16LE, |
| .video_codec = AV_CODEC_ID_NONE, |
| .write_header = w64_write_header, |
| .write_packet = wav_write_packet, |
| .write_trailer = w64_write_trailer, |
| .flags = AVFMT_TS_NONSTRICT, |
| .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 }, |
| }; |
| #endif /* CONFIG_W64_MUXER */ |
