* AIFF/AIFF-C demuxer
* Copyright (c) 2006 Patrick Guimond
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/dict.h"
#include "avformat.h"
+#include "internal.h"
#include "pcm.h"
#include "aiff.h"
typedef struct {
int64_t data_end;
+ int block_duration;
} AIFFInputContext;
-static enum CodecID aiff_codec_get_id(int bps)
+static enum AVCodecID aiff_codec_get_id(int bps)
{
if (bps <= 8)
- return CODEC_ID_PCM_S8;
+ return AV_CODEC_ID_PCM_S8;
if (bps <= 16)
- return CODEC_ID_PCM_S16BE;
+ return AV_CODEC_ID_PCM_S16BE;
if (bps <= 24)
- return CODEC_ID_PCM_S24BE;
+ return AV_CODEC_ID_PCM_S24BE;
if (bps <= 32)
- return CODEC_ID_PCM_S32BE;
+ return AV_CODEC_ID_PCM_S32BE;
/* bigger than 32 isn't allowed */
- return CODEC_ID_NONE;
+ return AV_CODEC_ID_NONE;
}
/* returns the size of the found tag */
{
int size;
- if (url_feof(pb))
+ if (pb->eof_reached)
return AVERROR(EIO);
*tag = avio_rl32(pb);
int res;
if (!str) {
- avio_seek(s->pb, size, SEEK_CUR);
+ avio_skip(s->pb, size);
return;
}
return;
str[res] = 0;
- av_metadata_set2(&s->metadata, key, str, AV_METADATA_DONT_STRDUP_VAL);
+ av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL);
}
/* Returns the number of sound data frames or negative on error */
-static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
- int size, unsigned version)
+static unsigned int get_aiff_header(AVFormatContext *s, int size,
+ unsigned version)
{
- AVExtFloat ext;
+ AVIOContext *pb = s->pb;
+ AVCodecContext *codec = s->streams[0]->codec;
+ AIFFInputContext *aiff = s->priv_data;
+ int exp;
+ uint64_t val;
double sample_rate;
unsigned int num_frames;
num_frames = avio_rb32(pb);
codec->bits_per_coded_sample = avio_rb16(pb);
- avio_read(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
- sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
+ exp = avio_rb16(pb);
+ val = avio_rb64(pb);
+ sample_rate = ldexp(val, exp - 16383 - 63);
codec->sample_rate = sample_rate;
size -= 18;
- /* Got an AIFF-C? */
+ /* get codec id for AIFF-C */
if (version == AIFF_C_VERSION1) {
codec->codec_tag = avio_rl32(pb);
codec->codec_id = ff_codec_get_id(ff_codec_aiff_tags, codec->codec_tag);
+ size -= 4;
+ }
+ if (version != AIFF_C_VERSION1 || codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
+ codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample);
+ codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id);
+ aiff->block_duration = 1;
+ } else {
switch (codec->codec_id) {
- case CODEC_ID_PCM_S16BE:
- codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample);
- codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id);
+ case AV_CODEC_ID_PCM_F32BE:
+ case AV_CODEC_ID_PCM_F64BE:
+ case AV_CODEC_ID_PCM_S16LE:
+ case AV_CODEC_ID_PCM_ALAW:
+ case AV_CODEC_ID_PCM_MULAW:
+ aiff->block_duration = 1;
break;
- case CODEC_ID_ADPCM_IMA_QT:
+ case AV_CODEC_ID_ADPCM_IMA_QT:
codec->block_align = 34*codec->channels;
- codec->frame_size = 64;
break;
- case CODEC_ID_MACE3:
+ case AV_CODEC_ID_MACE3:
codec->block_align = 2*codec->channels;
- codec->frame_size = 6;
break;
- case CODEC_ID_MACE6:
+ case AV_CODEC_ID_MACE6:
codec->block_align = 1*codec->channels;
- codec->frame_size = 6;
break;
- case CODEC_ID_GSM:
+ case AV_CODEC_ID_GSM:
codec->block_align = 33;
- codec->frame_size = 160;
break;
- case CODEC_ID_QCELP:
+ case AV_CODEC_ID_QCELP:
codec->block_align = 35;
- codec->frame_size= 160;
break;
default:
break;
}
- size -= 4;
- } else {
- /* Need the codec type */
- codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample);
- codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id);
+ if (codec->block_align > 0)
+ aiff->block_duration = av_get_audio_frame_duration(codec,
+ codec->block_align);
}
/* Block align needs to be computed in all cases, as the definition
if (!codec->block_align)
codec->block_align = (codec->bits_per_coded_sample * codec->channels) >> 3;
- codec->bit_rate = (codec->frame_size ? codec->sample_rate/codec->frame_size :
- codec->sample_rate) * (codec->block_align << 3);
+ if (aiff->block_duration) {
+ codec->bit_rate = codec->sample_rate * (codec->block_align << 3) /
+ aiff->block_duration;
+ }
/* Chunk is over */
if (size)
- avio_seek(pb, size, SEEK_CUR);
+ avio_skip(pb, size);
return num_frames;
}
}
/* aiff input */
-static int aiff_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int aiff_read_header(AVFormatContext *s)
{
int size, filesize;
int64_t offset = 0;
filesize -= 4;
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
switch (tag) {
case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
/* Then for the complete header info */
- st->nb_frames = get_aiff_header(pb, st->codec, size, version);
+ st->nb_frames = get_aiff_header(s, size, version);
if (st->nb_frames < 0)
return st->nb_frames;
if (offset > 0) // COMM is after SSND
offset += avio_tell(pb); /* Compute absolute data offset */
if (st->codec->block_align) /* Assume COMM already parsed */
goto got_sound;
- if (url_is_streamed(pb)) {
+ if (!pb->seekable) {
av_log(s, AV_LOG_ERROR, "file is not seekable\n");
return -1;
}
- avio_seek(pb, size - 8, SEEK_CUR);
+ avio_skip(pb, size - 8);
break;
case MKTAG('w', 'a', 'v', 'e'):
if ((uint64_t)size > (1<<30))
default: /* Jump */
if (size & 1) /* Always even aligned */
size++;
- avio_seek(pb, size, SEEK_CUR);
+ avio_skip(pb, size);
}
}
+got_sound:
if (!st->codec->block_align) {
- av_log(s, AV_LOG_ERROR, "could not find COMM tag\n");
+ av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
return -1;
}
-got_sound:
/* Now positioned, get the sound data start and end */
- if (st->nb_frames)
- s->file_size = st->nb_frames * st->codec->block_align;
-
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
st->start_time = 0;
- st->duration = st->codec->frame_size ?
- st->nb_frames * st->codec->frame_size : st->nb_frames;
+ st->duration = st->nb_frames * aiff->block_duration;
/* Position the stream at the first block */
avio_seek(pb, offset, SEEK_SET);
/* Only one stream in an AIFF file */
pkt->stream_index = 0;
+ pkt->duration = (res / st->codec->block_align) * aiff->block_duration;
return 0;
}
AVInputFormat ff_aiff_demuxer = {
- "aiff",
- NULL_IF_CONFIG_SMALL("Audio IFF"),
- sizeof(AIFFInputContext),
- aiff_probe,
- aiff_read_header,
- aiff_read_packet,
- NULL,
- pcm_read_seek,
- .codec_tag= (const AVCodecTag* const []){ff_codec_aiff_tags, 0},
+ .name = "aiff",
+ .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
+ .priv_data_size = sizeof(AIFFInputContext),
+ .read_probe = aiff_probe,
+ .read_header = aiff_read_header,
+ .read_packet = aiff_read_packet,
+ .read_seek = ff_pcm_read_seek,
+ .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
};
projects / ffmpeg / blobdiff