X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fwav.c;h=9fccf6429552a8989fb69c943fbd30ed21f00528;hb=6b6adf2bc86ba4b432554c054ef0470ba34d74ac;hp=5f7c5dd7a3ff86eb8f0816097c92d5ee036ddbc7;hpb=048446bfeba294c19e03607de67d8aa64f550f83;p=ffmpeg

diff --git a/libavformat/wav.c b/libavformat/wav.c
index 5f7c5dd7a3f..9fccf642955 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -1,174 +1,41 @@
-/* 
- * WAV encoder and decoder
+/*
+ * WAV muxer and demuxer
  * Copyright (c) 2001, 2002 Fabrice Bellard.
  *
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
-
-const CodecTag codec_wav_tags[] = {
-    { CODEC_ID_MP2, 0x50 },
-    { CODEC_ID_MP3LAME, 0x55 },
-    { CODEC_ID_AC3, 0x2000 },
-    { CODEC_ID_PCM_S16LE, 0x01 },
-    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
-    { CODEC_ID_PCM_ALAW, 0x06 },
-    { CODEC_ID_PCM_MULAW, 0x07 },
-    { CODEC_ID_ADPCM_MS, 0x02 },
-    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
-    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
-    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
-    { CODEC_ID_WMAV1, 0x160 },
-    { CODEC_ID_WMAV2, 0x161 },
-    { 0, 0 },
-};
-
-/* WAVEFORMATEX header */
-/* returns the size or -1 on error */
-int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
-{
-    int bps, blkalign, bytespersec;
-    int hdrsize = 18;
-
-    if(!enc->codec_tag)
-       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
-    if(!enc->codec_tag)
-        return -1;
-
-    put_le16(pb, enc->codec_tag);
-    put_le16(pb, enc->channels);
-    put_le32(pb, enc->sample_rate);
-    if (enc->codec_id == CODEC_ID_PCM_U8 ||
-        enc->codec_id == CODEC_ID_PCM_ALAW ||
-        enc->codec_id == CODEC_ID_PCM_MULAW) {
-        bps = 8;
-    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3LAME) {
-        bps = 0;
-    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS) {
-        bps = 4;
-    } else {
-        bps = 16;
-    }
-    
-    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3LAME) {
-        blkalign = 1;
-        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
-    } else if (enc->block_align != 0) { /* specified by the codec */
-        blkalign = enc->block_align;
-    } else
-        blkalign = enc->channels*bps >> 3;
-    if (enc->codec_id == CODEC_ID_PCM_U8 ||
-        enc->codec_id == CODEC_ID_PCM_S16LE) {
-        bytespersec = enc->sample_rate * blkalign;
-    } else {
-        bytespersec = enc->bit_rate / 8;
-    }
-    put_le32(pb, bytespersec); /* bytes per second */
-    put_le16(pb, blkalign); /* block align */
-    put_le16(pb, bps); /* bits per sample */
-    if (enc->codec_id == CODEC_ID_MP3LAME) {
-        put_le16(pb, 12); /* wav_extra_size */
-        hdrsize += 12;
-        put_le16(pb, 1); /* wID */
-        put_le32(pb, 2); /* fdwFlags */
-        put_le16(pb, 1152); /* nBlockSize */
-        put_le16(pb, 1); /* nFramesPerBlock */
-        put_le16(pb, 1393); /* nCodecDelay */
-    } else if (enc->codec_id == CODEC_ID_MP2) {
-        put_le16(pb, 22); /* wav_extra_size */
-        hdrsize += 22;
-        put_le16(pb, 2);  /* fwHeadLayer */
-        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
-        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
-        put_le16(pb, 0);  /* fwHeadModeExt */
-        put_le16(pb, 1);  /* wHeadEmphasis */
-        put_le16(pb, 16); /* fwHeadFlags */
-        put_le32(pb, 0);  /* dwPTSLow */
-        put_le32(pb, 0);  /* dwPTSHigh */
-    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
-        put_le16(pb, 2); /* wav_extra_size */
-        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
-    } else
-        put_le16(pb, 0); /* wav_extra_size */
-
-    return hdrsize;
-}
-
-/* We could be given one of the three possible structures here:
- * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
- * is an expansion of the previous one with the fields added
- * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
- * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
- * an openended structure.
- */
-void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size) 
-{
-    int id;
-
-    id = get_le16(pb);
-    codec->codec_type = CODEC_TYPE_AUDIO;
-    codec->codec_tag = id;
-    codec->channels = get_le16(pb);
-    codec->sample_rate = get_le32(pb);
-    codec->bit_rate = get_le32(pb) * 8;
-    codec->block_align = get_le16(pb);
-    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
-        codec->bits_per_sample = 8;
-    }else
-        codec->bits_per_sample = get_le16(pb);
-    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
-
-    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
-	codec->extradata_size = get_le16(pb);
-	if (codec->extradata_size > 0) {
-	    if (codec->extradata_size > size - 18)
-	        codec->extradata_size = size - 18;
-            codec->extradata = av_mallocz(codec->extradata_size);
-            get_buffer(pb, codec->extradata, codec->extradata_size);
-        } else
-	    codec->extradata_size = 0;
-	
-	/* It is possible for the chunk to contain garbage at the end */
-	if (size - codec->extradata_size - 18 > 0)
-	    url_fskip(pb, size - codec->extradata_size - 18);
-    }
-}
-
-
-int wav_codec_get_id(unsigned int tag, int bps)
-{
-    int id;
-    id = codec_get_id(codec_wav_tags, tag);
-    if (id <= 0)
-        return id;
-    /* handle specific u8 codec */
-    if (id == CODEC_ID_PCM_S16LE && bps == 8)
-        id = CODEC_ID_PCM_U8;
-    return id;
-}
+#include "raw.h"
+#include "riff.h"
 
 typedef struct {
     offset_t data;
+    offset_t data_end;
+    int64_t minpts;
+    int64_t maxpts;
+    int last_duration;
 } WAVContext;
 
+#ifdef CONFIG_MUXERS
 static int wav_write_header(AVFormatContext *s)
 {
     WAVContext *wav = s->priv_data;
     ByteIOContext *pb = &s->pb;
-    offset_t fmt;
+    offset_t fmt, fact;
 
     put_tag(pb, "RIFF");
     put_le32(pb, 0); /* file length */
@@ -176,25 +43,42 @@ static int wav_write_header(AVFormatContext *s)
 
     /* format header */
     fmt = start_tag(pb, "fmt ");
-    if (put_wav_header(pb, &s->streams[0]->codec) < 0) {
+    if (put_wav_header(pb, s->streams[0]->codec) < 0) {
         av_free(wav);
         return -1;
     }
     end_tag(pb, fmt);
 
+    if(s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
+       && !url_is_streamed(&s->pb)) {
+        fact = start_tag(pb, "fact");
+        put_le32(pb, 0);
+        end_tag(pb, fact);
+    }
+
+    av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
+    wav->maxpts = wav->last_duration = 0;
+    wav->minpts = INT64_MAX;
+
     /* data header */
     wav->data = start_tag(pb, "data");
-    
+
     put_flush_packet(pb);
 
     return 0;
 }
 
-static int wav_write_packet(AVFormatContext *s, int stream_index_ptr,
-                           uint8_t *buf, int size, int force_pts)
+static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ByteIOContext *pb = &s->pb;
-    put_buffer(pb, buf, size);
+    WAVContext *wav = s->priv_data;
+    put_buffer(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;
 }
 
@@ -214,9 +98,22 @@ static int wav_write_trailer(AVFormatContext *s)
         url_fseek(pb, file_size, SEEK_SET);
 
         put_flush_packet(pb);
+
+        if(s->streams[0]->codec->codec_tag != 0x01) {
+            /* Update num_samps in fact chunk */
+            int 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);
+            url_fseek(pb, wav->data-12, SEEK_SET);
+            put_le32(pb, number_of_samples);
+            url_fseek(pb, file_size, SEEK_SET);
+            put_flush_packet(pb);
+        }
     }
     return 0;
 }
+#endif //CONFIG_MUXERS
 
 /* return the size of the found tag */
 /* XXX: > 2GB ? */
@@ -261,6 +158,7 @@ static int wav_read_header(AVFormatContext *s,
     unsigned int tag;
     ByteIOContext *pb = &s->pb;
     AVStream *st;
+    WAVContext *wav = s->priv_data;
 
     /* check RIFF header */
     tag = get_le32(pb);
@@ -271,20 +169,24 @@ static int wav_read_header(AVFormatContext *s,
     tag = get_le32(pb);
     if (tag != MKTAG('W', 'A', 'V', 'E'))
         return -1;
-    
+
     /* parse fmt header */
     size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
     if (size < 0)
         return -1;
     st = av_new_stream(s, 0);
     if (!st)
-        return AVERROR_NOMEM;
+        return AVERROR(ENOMEM);
+
+    get_wav_header(pb, st->codec, size);
+    st->need_parsing = AVSTREAM_PARSE_FULL;
+
+    av_set_pts_info(st, 64, 1, st->codec->sample_rate);
 
-    get_wav_header(pb, &st->codec, size);
-    
     size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
     if (size < 0)
         return -1;
+    wav->data_end= url_ftell(pb) + size;
     return 0;
 }
 
@@ -293,17 +195,35 @@ static int wav_read_header(AVFormatContext *s,
 static int wav_read_packet(AVFormatContext *s,
                            AVPacket *pkt)
 {
-    int ret;
+    int ret, size, left;
+    AVStream *st;
+    WAVContext *wav = s->priv_data;
 
     if (url_feof(&s->pb))
-        return -EIO;
-    if (av_new_packet(pkt, MAX_SIZE))
-        return -EIO;
+        return AVERROR(EIO);
+    st = s->streams[0];
+
+    left= wav->data_end - url_ftell(&s->pb);
+    if(left <= 0){
+        left = find_tag(&(s->pb), MKTAG('d', 'a', 't', 'a'));
+        if (left < 0) {
+            return AVERROR(EIO);
+        }
+        wav->data_end= url_ftell(&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 AVERROR(EIO);
     pkt->stream_index = 0;
 
-    ret = get_buffer(&s->pb, pkt->data, pkt->size);
-    if (ret < 0)
-        av_free_packet(pkt);
     /* note: we need to modify the packet size here to handle the last
        packet */
     pkt->size = ret;
@@ -315,17 +235,41 @@ static int wav_read_close(AVFormatContext *s)
     return 0;
 }
 
-static AVInputFormat wav_iformat = {
+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 CODEC_ID_MP2:
+    case CODEC_ID_MP3:
+    case CODEC_ID_AC3:
+    case CODEC_ID_DTS:
+        /* use generic seeking with dynamically generated indexes */
+        return -1;
+    default:
+        break;
+    }
+    return pcm_read_seek(s, stream_index, timestamp, flags);
+}
+
+#ifdef CONFIG_WAV_DEMUXER
+AVInputFormat wav_demuxer = {
     "wav",
     "wav format",
-    0,
+    sizeof(WAVContext),
     wav_probe,
     wav_read_header,
     wav_read_packet,
     wav_read_close,
+    wav_read_seek,
+    .flags= AVFMT_GENERIC_INDEX,
+    .codec_tag= (const AVCodecTag*[]){codec_wav_tags, 0},
 };
-
-static AVOutputFormat wav_oformat = {
+#endif
+#ifdef CONFIG_WAV_MUXER
+AVOutputFormat wav_muxer = {
     "wav",
     "wav format",
     "audio/x-wav",
@@ -336,11 +280,6 @@ static AVOutputFormat wav_oformat = {
     wav_write_header,
     wav_write_packet,
     wav_write_trailer,
+    .codec_tag= (const AVCodecTag*[]){codec_wav_tags, 0},
 };
-
-int wav_init(void)
-{
-    av_register_input_format(&wav_iformat);
-    av_register_output_format(&wav_oformat);
-    return 0;
-}
+#endif