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Diffstat (limited to 'ffmpeg/libavformat/wavenc.c')
-rw-r--r--ffmpeg/libavformat/wavenc.c383
1 files changed, 383 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/wavenc.c b/ffmpeg/libavformat/wavenc.c
new file mode 100644
index 0000000..fea38cf
--- /dev/null
+++ b/ffmpeg/libavformat/wavenc.c
@@ -0,0 +1,383 @@
+/*
+ * 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>
+ *
+ * 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/dict.h"
+#include "libavutil/common.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.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
+
+typedef struct WAVMuxContext {
+ const AVClass *class;
+ int64_t data;
+ int64_t fact_pos;
+ int64_t ds64;
+ int64_t minpts;
+ int64_t maxpts;
+ int last_duration;
+ int write_bext;
+ int rf64;
+} WAVMuxContext;
+
+#if CONFIG_WAV_MUXER
+static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
+{
+ AVDictionaryEntry *tag;
+ int 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)) {
+ unsigned char umidpart_str[17] = {0};
+ int i;
+ uint64_t umidpart;
+ int 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 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, 0); /* 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);
+ }
+
+ /* format header */
+ fmt = ff_start_tag(pb, "fmt ");
+ if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
+ av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
+ s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
+ return -1;
+ }
+ 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);
+
+ 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;
+
+ /* 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;
+ avio_write(pb, pkt->data, pkt->size);
+ 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;
+
+ avio_flush(pb);
+
+ if (s->pb->seekable) {
+ /* 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 {
+ avio_seek(pb, 4, SEEK_SET);
+ avio_wl32(pb, (uint32_t)(file_size - 8));
+ avio_seek(pb, file_size, SEEK_SET);
+
+ ff_end_tag(pb, wav->data);
+ avio_flush(pb);
+ }
+
+ 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);
+ }
+ }
+ return 0;
+}
+
+#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_INT, { .i64 = 0 }, 0, 1, ENC },
+ { "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" },
+ { 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) {
+ 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 */
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