diff options
author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-10-27 02:30:22 +0400 |
---|---|---|
committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-10-29 21:43:28 +0400 |
commit | c25df22365b059a36f63f2810ef26abaec833231 (patch) | |
tree | 82d01f6a5b3d5695672c9fcab36f5cd1e6c2bd68 /libavcodec/cook.c | |
parent | 69e7ad8dbc9896aff70f1f1125c726764f28455f (diff) |
cook: output float samples instead of converting to int16
Diffstat (limited to 'libavcodec/cook.c')
-rw-r--r-- | libavcodec/cook.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/libavcodec/cook.c b/libavcodec/cook.c index 13f2dd66a6..d3e7de8c78 100644 --- a/libavcodec/cook.c +++ b/libavcodec/cook.c @@ -124,7 +124,7 @@ typedef struct cook { void (* interpolate) (struct cook *q, float* buffer, int gain_index, int gain_index_next); - void (* saturate_output) (struct cook *q, int chan, int16_t *out); + void (* saturate_output) (struct cook *q, int chan, float *out); AVCodecContext* avctx; GetBitContext gb; @@ -229,7 +229,7 @@ static av_cold int init_cook_mlt(COOKContext *q) { q->mlt_window[j] *= sqrt(2.0 / q->samples_per_channel); /* Initialize the MDCT. */ - if (ff_mdct_init(&q->mdct_ctx, av_log2(mlt_size)+1, 1, 1.0)) { + if (ff_mdct_init(&q->mdct_ctx, av_log2(mlt_size)+1, 1, 1.0/32768.0)) { av_free(q->mlt_window); return -1; } @@ -867,22 +867,18 @@ decode_bytes_and_gain(COOKContext *q, COOKSubpacket *p, const uint8_t *inbuffer, } /** - * Saturate the output signal to signed 16bit integers. + * Saturate the output signal and interleave. * * @param q pointer to the COOKContext * @param chan channel to saturate * @param out pointer to the output vector */ -static void -saturate_output_float (COOKContext *q, int chan, int16_t *out) +static void saturate_output_float(COOKContext *q, int chan, float *out) { int j; float *output = q->mono_mdct_output + q->samples_per_channel; - /* Clip and convert floats to 16 bits. - */ for (j = 0; j < q->samples_per_channel; j++) { - out[chan + q->nb_channels * j] = - av_clip_int16(lrintf(output[j])); + out[chan + q->nb_channels * j] = av_clipf(output[j], -1.0, 1.0); } } @@ -902,7 +898,7 @@ saturate_output_float (COOKContext *q, int chan, int16_t *out) static inline void mlt_compensate_output(COOKContext *q, float *decode_buffer, cook_gains *gains_ptr, float *previous_buffer, - int16_t *out, int chan) + float *out, int chan) { imlt_gain(q, decode_buffer, gains_ptr, previous_buffer); q->saturate_output (q, chan, out); @@ -917,7 +913,9 @@ mlt_compensate_output(COOKContext *q, float *decode_buffer, * @param inbuffer pointer to the inbuffer * @param outbuffer pointer to the outbuffer */ -static void decode_subpacket(COOKContext *q, COOKSubpacket* p, const uint8_t *inbuffer, int16_t *outbuffer) { +static void decode_subpacket(COOKContext *q, COOKSubpacket *p, + const uint8_t *inbuffer, float *outbuffer) +{ int sub_packet_size = p->size; /* packet dump */ // for (i=0 ; i<sub_packet_size ; i++) { @@ -991,12 +989,13 @@ static int cook_decode_frame(AVCodecContext *avctx, q->subpacket[i].bits_per_subpacket = (q->subpacket[i].size*8)>>q->subpacket[i].bits_per_subpdiv; q->subpacket[i].ch_idx = chidx; av_log(avctx,AV_LOG_DEBUG,"subpacket[%i] size %i js %i %i block_align %i\n",i,q->subpacket[i].size,q->subpacket[i].joint_stereo,offset,avctx->block_align); - decode_subpacket(q, &q->subpacket[i], buf + offset, (int16_t*)data); + decode_subpacket(q, &q->subpacket[i], buf + offset, data); offset += q->subpacket[i].size; chidx += q->subpacket[i].num_channels; av_log(avctx,AV_LOG_DEBUG,"subpacket[%i] %i %i\n",i,q->subpacket[i].size * 8,get_bits_count(&q->gb)); } - *data_size = sizeof(int16_t) * q->nb_channels * q->samples_per_channel; + *data_size = q->nb_channels * q->samples_per_channel * + av_get_bytes_per_sample(avctx->sample_fmt); /* Discard the first two frames: no valid audio. */ if (avctx->frame_number < 2) *data_size = 0; @@ -1240,7 +1239,7 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) return -1; } - avctx->sample_fmt = AV_SAMPLE_FMT_S16; + avctx->sample_fmt = AV_SAMPLE_FMT_FLT; if (channel_mask) avctx->channel_layout = channel_mask; else |