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Set a constant frame size for encoding G.726 audio.
Originally committed as revision 25107 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -334,6 +334,11 @@ static av_cold int g726_init(AVCodecContext * avctx)
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if (avctx->codec->decode)
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avctx->sample_fmt = SAMPLE_FMT_S16;
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/* select a frame size that will end on a byte boundary and have a size of
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approximately 1024 bytes */
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if (avctx->codec->encode)
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avctx->frame_size = ((int[]){ 4096, 2736, 2048, 1640 })[index];
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return 0;
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}
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@ -350,10 +355,11 @@ static int g726_encode_frame(AVCodecContext *avctx,
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G726Context *c = avctx->priv_data;
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const short *samples = data;
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PutBitContext pb;
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int i;
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init_put_bits(&pb, dst, 1024*1024);
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for (; buf_size; buf_size--)
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for (i = 0; i < avctx->frame_size; i++)
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put_bits(&pb, c->code_size, g726_encode(c, *samples++));
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flush_put_bits(&pb);
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@ -394,6 +400,7 @@ AVCodec adpcm_g726_encoder = {
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g726_encode_frame,
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g726_close,
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NULL,
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.capabilities = CODEC_CAP_SMALL_LAST_FRAME,
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.sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"),
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};
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@ -1,4 +1,4 @@
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5d8cce28f83dd33c3c7eaf43a5db5294 *./tests/data/acodec/g726.wav
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24082 ./tests/data/acodec/g726.wav
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4f1ba1af75dee64625a1c852e6cd01d3 *./tests/data/g726.acodec.out.wav
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stddev: 8504.69 PSNR: 17.74 MAXDIFF:31645 bytes: 96104/ 1058400
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fd090ddf05cc3401cc75c4a5ace1d05a *./tests/data/acodec/g726.wav
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24052 ./tests/data/acodec/g726.wav
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74abea06027375111eeac1b2f8c7d3af *./tests/data/g726.acodec.out.wav
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stddev: 8554.55 PSNR: 17.69 MAXDIFF:29353 bytes: 95984/ 1058400
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