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aiffdec: do not set AVCodecContext.frame_size 

It is unnecessary. Also, for some codecs we're reading more than 1 frame per
packet. Instead we use a private context variable to calculate the bit rate,
stream duration, and packet durations.

Updated FATE seek test, which has slightly different timestamps due to a
more accurate bit rate calculation.
This commit is contained in:
Justin Ruggles 2012-02-26 22:55:52 -05:00
parent 237a855caf
commit 8d1a20aa7c
2 changed files with 36 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
libavformat/aiffdec.c
View File

@ -31,6 +31,7 @@
typedef struct {
int64_t data_end;
int block_duration;
} AIFFInputContext;
static enum CodecID aiff_codec_get_id(int bps)
@ -85,9 +86,12 @@ static void get_meta(AVFormatContext *s, const char *key, int size)
}
/* 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)
{
AVIOContext *pb = s->pb;
AVCodecContext *codec = s->streams[0]->codec;
AIFFInputContext *aiff = s->priv_data;
int exp;
uint64_t val;
double sample_rate;
@ -115,26 +119,27 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
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);
aiff->block_duration = 1;
break;
case CODEC_ID_ADPCM_IMA_QT:
codec->block_align = 34*codec->channels;
codec->frame_size = 64;
aiff->block_duration = 64;
break;
case CODEC_ID_MACE3:
codec->block_align = 2*codec->channels;
codec->frame_size = 6;
aiff->block_duration = 6;
break;
case CODEC_ID_MACE6:
codec->block_align = 1*codec->channels;
codec->frame_size = 6;
aiff->block_duration = 6;
break;
case CODEC_ID_GSM:
codec->block_align = 33;
codec->frame_size = 160;
aiff->block_duration = 160;
break;
case CODEC_ID_QCELP:
codec->block_align = 35;
codec->frame_size= 160;
aiff->block_duration = 160;
break;
default:
break;
@ -144,6 +149,7 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
/* 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);
aiff->block_duration = 1;
}
/* Block align needs to be computed in all cases, as the definition
@ -151,8 +157,8 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
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);
codec->bit_rate = codec->sample_rate * (codec->block_align << 3) /
aiff->block_duration;
/* Chunk is over */
if (size)
@ -213,7 +219,7 @@ static int aiff_read_header(AVFormatContext *s)
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
@ -272,8 +278,7 @@ got_sound:
/* Now positioned, get the sound data start and end */
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);
@ -308,6 +313,7 @@ static int aiff_read_packet(AVFormatContext *s,
/* Only one stream in an AIFF file */
pkt->stream_index = 0;
pkt->duration = (res / st->codec->block_align) * aiff->block_duration;
return 0;
}

36
tests/ref/seek/adpcm_qt_aiff
View File

@ -2,52 +2,52 @@ ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 1.894059 pts: 1.894059 pos: 88812 size: 68
ret: 0 st: 0 flags:1 dts: 1.893878 pts: 1.893878 pos: 88812 size: 68
ret: 0 st: 0 flags:0 ts: 0.788345
ret: 0 st: 0 flags:1 dts: 0.789546 pts: 0.789546 pos: 37064 size: 68
ret: 0 st: 0 flags:1 dts: 0.789478 pts: 0.789478 pos: 37064 size: 68
ret: 0 st: 0 flags:1 ts:-0.317506
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: 2.577642 pts: 2.577642 pos: 120840 size: 68
ret: 0 st: 0 flags:1 dts: 2.577438 pts: 2.577438 pos: 120840 size: 68
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 1.470249 pts: 1.470249 pos: 68956 size: 68
ret: 0 st: 0 flags:1 dts: 1.470113 pts: 1.470113 pos: 68956 size: 68
ret: 0 st: 0 flags:0 ts: 0.365011
ret: 0 st: 0 flags:1 dts: 0.365737 pts: 0.365737 pos: 17208 size: 68
ret: 0 st: 0 flags:1 dts: 0.365714 pts: 0.365714 pos: 17208 size: 68
ret: 0 st: 0 flags:1 ts:-0.740839
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: 2.153855 pts: 2.153855 pos: 100984 size: 68
ret: 0 st: 0 flags:1 dts: 2.153673 pts: 2.153673 pos: 100984 size: 68
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 1.046440 pts: 1.046440 pos: 49100 size: 68
ret: 0 st: 0 flags:1 dts: 1.046349 pts: 1.046349 pos: 49100 size: 68
ret: 0 st: 0 flags:0 ts:-0.058322
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st: 0 flags:1 ts: 2.835828
ret: 0 st: 0 flags:1 dts: 2.834535 pts: 2.834535 pos: 132876 size: 68
ret: 0 st: 0 flags:1 dts: 2.835760 pts: 2.835760 pos: 132944 size: 68
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 1.730045 pts: 1.730045 pos: 81128 size: 68
ret: 0 st: 0 flags:1 dts: 1.731338 pts: 1.731338 pos: 81196 size: 68
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.624082 pts: 0.624082 pos: 29312 size: 68
ret: 0 st: 0 flags:1 dts: 0.624036 pts: 0.624036 pos: 29312 size: 68
ret: 0 st: 0 flags:0 ts:-0.481655
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st: 0 flags:1 ts: 2.412494
ret: 0 st: 0 flags:1 dts: 2.412200 pts: 2.412200 pos: 113088 size: 68
ret: 0 st: 0 flags:1 dts: 2.411995 pts: 2.411995 pos: 113088 size: 68
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 1.307687 pts: 1.307687 pos: 61340 size: 68
ret: 0 st: 0 flags:1 dts: 1.307574 pts: 1.307574 pos: 61340 size: 68
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.200295 pts: 0.200295 pos: 9456 size: 68
ret: 0 st: 0 flags:1 dts: 0.200272 pts: 0.200272 pos: 9456 size: 68
ret: 0 st: 0 flags:0 ts:-0.904989
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st: 0 flags:1 ts: 1.989184
ret: 0 st: 0 flags:1 dts: 1.988390 pts: 1.988390 pos: 93232 size: 68
ret: 0 st: 0 flags:1 dts: 1.988209 pts: 1.988209 pos: 93232 size: 68
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.883900 pts: 0.883900 pos: 41484 size: 68
ret: 0 st: 0 flags:1 dts: 0.883810 pts: 0.883810 pos: 41484 size: 68
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68
ret: 0 st: 0 flags:0 ts: 2.671678
ret: 0 st: 0 flags:1 dts: 2.671995 pts: 2.671995 pos: 125260 size: 68
ret: 0 st: 0 flags:1 dts: 2.671769 pts: 2.671769 pos: 125260 size: 68
ret: 0 st: 0 flags:1 ts: 1.565850
ret: 0 st: 0 flags:1 dts: 1.564580 pts: 1.564580 pos: 73376 size: 68
ret: 0 st: 0 flags:1 dts: 1.564444 pts: 1.564444 pos: 73376 size: 68
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.460091 pts: 0.460091 pos: 21628 size: 68
ret: 0 st: 0 flags:1 dts: 0.460045 pts: 0.460045 pos: 21628 size: 68
ret: 0 st:-1 flags:1 ts:-0.645825
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 72 size: 68