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Code Issues Releases Activity

libopencore-amrnbenc: fix end-of-stream handling

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Use CODEC_CAP_DELAY and CODEC_CAP_SMALL_LAST_FRAME to properly pad and flush
the encoder at the end of encoding. This is needed in order to have all input
samples decoded.
This commit is contained in:
Justin Ruggles 2012-03-04 00:25:45 -05:00
parent b0350c1c30
commit fe78470a8b
1 changed files with 27 additions and 1 deletions
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28
libavcodec/libopencore-amr.c
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@ -85,6 +85,7 @@ typedef struct AMRContext {
int enc_bitrate;
int enc_mode;
int enc_dtx;
int enc_last_frame;
} AMRContext;
static const AVOption options[] = {
@ -195,6 +196,7 @@ static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
}
avctx->frame_size = 160;
avctx->delay = 50;
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
@ -227,17 +229,40 @@ static int amr_nb_encode_frame(AVCodecContext *avctx,
{
AMRContext *s = avctx->priv_data;
int written;
int16_t *flush_buf = NULL;
const int16_t *samples = data;
if (s->enc_bitrate != avctx->bit_rate) {
s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
s->enc_bitrate = avctx->bit_rate;
}
written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, data,
if (data) {
if (avctx->frame_size < 160) {
flush_buf = av_mallocz(160 * sizeof(*flush_buf));
if (!flush_buf)
return AVERROR(ENOMEM);
memcpy(flush_buf, samples, avctx->frame_size * sizeof(*flush_buf));
samples = flush_buf;
if (avctx->frame_size < 110)
s->enc_last_frame = -1;
}
} else {
if (s->enc_last_frame < 0)
return 0;
flush_buf = av_mallocz(160 * sizeof(*flush_buf));
if (!flush_buf)
return AVERROR(ENOMEM);
samples = flush_buf;
s->enc_last_frame = -1;
}
written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
frame, 0);
av_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
written, s->enc_mode, frame[0]);
av_freep(&flush_buf);
return written;
}
@ -249,6 +274,7 @@ AVCodec ff_libopencore_amrnb_encoder = {
.init = amr_nb_encode_init,
.encode = amr_nb_encode_frame,
.close = amr_nb_encode_close,
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME,
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
.priv_class = &class,