mirrors/librempeg
1
0
Fork 0
mirror of https://github.com/librempeg/librempeg synced 2024-11-23 19:58:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

g722enc: set frame_size, and also handle an odd number of input samples

Browse Source 
The fate reference is updated because the previous test skipped a sample in
each encode() call due each input frame having an odd number of samples.
This commit is contained in:
Justin Ruggles 2012-01-06 15:32:44 -05:00
parent 34093ba081
commit 77c5b66cbe
2 changed files with 40 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
libavcodec/g722enc.c
View File

@ -32,6 +32,10 @@
#define FREEZE_INTERVAL 128
/* This is an arbitrary value. Allowing insanely large values leads to strange
problems, so we limit it to a reasonable value */
#define MAX_FRAME_SIZE 32768
static av_cold int g722_encode_init(AVCodecContext * avctx)
{
G722Context *c = avctx->priv_data;
@ -56,6 +60,29 @@ static av_cold int g722_encode_init(AVCodecContext * avctx)
}
}
if (avctx->frame_size) {
/* validate frame size */
if (avctx->frame_size & 1 || avctx->frame_size > MAX_FRAME_SIZE) {
int new_frame_size;
if (avctx->frame_size == 1)
new_frame_size = 2;
else if (avctx->frame_size > MAX_FRAME_SIZE)
new_frame_size = MAX_FRAME_SIZE;
else
new_frame_size = avctx->frame_size - 1;
av_log(avctx, AV_LOG_WARNING, "Requested frame size is not "
"allowed. Using %d instead of %d\n", new_frame_size,
avctx->frame_size);
avctx->frame_size = new_frame_size;
}
} else {
/* This is arbitrary. We use 320 because it's 20ms @ 16kHz, which is
a common packet size for VoIP applications */
avctx->frame_size = 320;
}
return 0;
}
@ -301,14 +328,20 @@ static int g722_encode_frame(AVCodecContext *avctx,
const int16_t *samples = data;
int nb_samples;
nb_samples = buf_size * 2;
nb_samples = avctx->frame_size - (avctx->frame_size & 1);
if (avctx->trellis)
g722_encode_trellis(c, avctx->trellis, dst, nb_samples, samples);
else
g722_encode_no_trellis(c, dst, nb_samples, samples);
return buf_size;
/* handle last frame with odd frame_size */
if (nb_samples < avctx->frame_size) {
int16_t last_samples[2] = { samples[nb_samples], samples[nb_samples] };
encode_byte(c, &dst[nb_samples >> 1], last_samples);
}
return (avctx->frame_size + 1) >> 1;
}
AVCodec ff_adpcm_g722_encoder = {
@ -319,6 +352,7 @@ AVCodec ff_adpcm_g722_encoder = {
.init = g722_encode_init,
.close = g722_encode_close,
.encode = g722_encode_frame,
.capabilities = CODEC_CAP_SMALL_LAST_FRAME,
.long_name = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
};

8
tests/ref/acodec/g722
View File

@ -1,4 +1,4 @@
b380355e0360b4e50ee78f33fd60a0f5 *./tests/data/acodec/g722.wav
47991 ./tests/data/acodec/g722.wav
82fdd5bb059336e0550de7ba5947c5bb *./tests/data/g722.acodec.out.wav
stddev: 8860.44 PSNR: 17.38 MAXDIFF:33814 bytes: 191732/ 1058400
1975cc4a3521e374b33ae042e182f6b6 *./tests/data/acodec/g722.wav
48053 ./tests/data/acodec/g722.wav
ade04cdcf249e6946395f109b077dd62 *./tests/data/g722.acodec.out.wav
stddev: 8841.24 PSNR: 17.40 MAXDIFF:36225 bytes: 191980/ 1058400