diff ffmpeg/libavformat/wavenc.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/wavenc.c	Sun Apr 21 11:16:23 2013 +0200
@@ -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 <[e-mail]>
+ *
+ * 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 */