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Change to libav 9 resampling (avresample)

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Some of the previous libav stuff removed, re-add later
This commit is contained in:
ejurgensen 2013-12-30 13:03:53 +01:00
parent 73b2d08400
commit 3a8936cd26
1 changed files with 23 additions and 51 deletions
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74
src/transcode.c
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@ -68,7 +68,6 @@ struct transcode_ctx {
/* Resampling */
int need_resample;
int input_size;
AVAudioResampleContext *resample_ctx;
int16_t *re_abuffer;
@ -152,6 +151,9 @@ transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted)
#if LIBAVCODEC_VERSION_MAJOR >= 54 || (LIBAVCODEC_VERSION_MAJOR == 53 && LIBAVCODEC_VERSION_MINOR >= 35)
AVFrame *frame = NULL;
int got_frame;
int out_size;
int out_linesize;
int out_samples;
#endif
processed = 0;
@ -169,7 +171,6 @@ transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted)
/* Decode data */
while (ctx->apacket2.size > 0)
{
#if LIBAVCODEC_VERSION_MAJOR >= 54 || (LIBAVCODEC_VERSION_MAJOR == 53 && LIBAVCODEC_VERSION_MINOR >= 35)
got_frame = 0;
if (!frame)
@ -189,12 +190,6 @@ transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted)
used = avcodec_decode_audio4(ctx->acodec,
frame, &got_frame,
&ctx->apacket2);
#else
buflen = XCODE_BUFFER_SIZE;
used = avcodec_decode_audio3(ctx->acodec,
ctx->abuffer, &buflen,
&ctx->apacket2);
#endif
if (used < 0)
{
@ -206,44 +201,38 @@ transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted)
ctx->apacket2.data += used;
ctx->apacket2.size -= used;
#if LIBAVCODEC_VERSION_MAJOR >= 54 || (LIBAVCODEC_VERSION_MAJOR == 53 && LIBAVCODEC_VERSION_MINOR >= 35)
/* No frame decoded this time around */
if (!got_frame)
continue;
buflen = av_samples_get_buffer_size(NULL, ctx->acodec->channels, frame->nb_samples, ctx->acodec->sample_fmt, 1);
if (buflen > XCODE_BUFFER_SIZE)
{
DPRINTF(E_LOG, L_XCODE, "Output buffer too small for frame (%d > %d)\n", buflen, XCODE_BUFFER_SIZE);
return -1;
}
memcpy(ctx->abuffer, frame->data[0], buflen);
#else
/* No frame decoded this time around */
if (buflen == 0)
continue;
#endif
if (ctx->need_resample)
{
//FIXME buflen = audio_resample(ctx->resample_ctx, ctx->re_abuffer, ctx->abuffer, buflen / ctx->input_size);
buflen = 0;
out_size = av_samples_get_buffer_size(&out_linesize, 2, frame->nb_samples, AV_SAMPLE_FMT_S16, 0);
if (buflen == 0)
buf = av_realloc(ctx->re_abuffer, out_size);
if (!buf)
{
DPRINTF(E_LOG, L_XCODE, "Out of memory for resample buffer!\n");
return -1;
}
out_samples = avresample_convert(ctx->resample_ctx, (uint8_t **)&buf, out_linesize, frame->nb_samples,
(uint8_t **)frame->data, frame->linesize[0], frame->nb_samples);
if (out_samples < 0)
{
DPRINTF(E_LOG, L_XCODE, "Resample returned no samples!\n");
return -1;
}
buflen = buflen * 2 * 2; /* 16bit samples, 2 channels */
buf = ctx->re_abuffer;
buflen = out_samples * av_get_bytes_per_sample(AV_SAMPLE_FMT_S16) * 2; /* 16bit samples, 2 channels */
}
else
buf = ctx->abuffer;
{
buf = (int16_t *)frame->data[0];
buflen = av_samples_get_buffer_size(NULL, ctx->acodec->channels, frame->nb_samples, ctx->acodec->sample_fmt, 1);
}
#if BYTE_ORDER == BIG_ENDIAN
/* swap buffer, LE16 */
@ -478,7 +467,7 @@ transcode_setup(struct media_file_info *mfi, off_t *est_size, int wavhdr)
}
ctx->need_resample = (ctx->acodec->sample_fmt != AV_SAMPLE_FMT_S16)
|| (ctx->acodec->channel_layout != AV_CH_LAYOUT_STEREO)
|| (ctx->acodec->channels != 2)
|| (ctx->acodec->sample_rate != 44100);
if (ctx->need_resample)
@ -488,7 +477,7 @@ transcode_setup(struct media_file_info *mfi, off_t *est_size, int wavhdr)
ctx->resample_ctx = avresample_alloc_context();
if (!ctx->resample_ctx)
{
DPRINTF(E_WARN, L_XCODE, "Out of memory for resample context\n");
DPRINTF(E_LOG, L_XCODE, "Out of memory for resample context\n");
goto setup_fail_codec;
}
@ -503,28 +492,11 @@ transcode_setup(struct media_file_info *mfi, off_t *est_size, int wavhdr)
ret = avresample_open(ctx->resample_ctx);
if (ret < 0)
{
DPRINTF(E_WARN, L_XCODE, "Out of memory for resample context\n");
DPRINTF(E_LOG, L_XCODE, "Could not open resample context\n");
avresample_free(&ctx->resample_ctx);
goto setup_fail_codec;
}
ctx->re_abuffer = (int16_t *)av_malloc(XCODE_BUFFER_SIZE * 2);
if (!ctx->re_abuffer)
{
DPRINTF(E_WARN, L_XCODE, "Could not allocate resample buffer\n");
avresample_free(&ctx->resample_ctx);
goto setup_fail_codec;
}
#if LIBAVUTIL_VERSION_MAJOR >= 52 || (LIBAVUTIL_VERSION_MAJOR == 51 && LIBAVUTIL_VERSION_MINOR >= 4)
ctx->input_size = ctx->acodec->channels * av_get_bytes_per_sample(ctx->acodec->sample_fmt);
#elif LIBAVCODEC_VERSION_MAJOR >= 53
ctx->input_size = ctx->acodec->channels * av_get_bits_per_sample_fmt(ctx->acodec->sample_fmt) / 8;
#else
ctx->input_size = ctx->acodec->channels * av_get_bits_per_sample_format(ctx->acodec->sample_fmt) / 8;
#endif
}
ctx->duration = mfi->song_length;