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wmaenc: use float planar sample format

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This commit is contained in:
Justin Ruggles 2012-08-25 13:44:30 -04:00
parent b1540fc884
commit 31b2262dca
3 changed files with 18 additions and 15 deletions
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1
libavcodec/wma.c
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@ -89,6 +89,7 @@ int ff_wma_init(AVCodecContext *avctx, int flags2)
ff_dsputil_init(&s->dsp, avctx);
ff_fmt_convert_init(&s->fmt_conv, avctx);
avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
s->version = 1;

2
libavcodec/wma.h
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@ -22,6 +22,7 @@
#ifndef AVCODEC_WMA_H
#define AVCODEC_WMA_H
#include "libavutil/float_dsp.h"
#include "get_bits.h"
#include "put_bits.h"
#include "dsputil.h"
@ -137,6 +138,7 @@ typedef struct WMACodecContext {
float lsp_pow_m_table2[(1 << LSP_POW_BITS)];
DSPContext dsp;
FmtConvertContext fmt_conv;
AVFloatDSPContext fdsp;
#ifdef TRACE
int frame_count;

30
libavcodec/wmaenc.c
View File

@ -97,23 +97,24 @@ static int encode_init(AVCodecContext * avctx){
}
static void apply_window_and_mdct(AVCodecContext * avctx, const signed short * audio, int len) {
static void apply_window_and_mdct(AVCodecContext * avctx, const AVFrame *frame)
{
WMACodecContext *s = avctx->priv_data;
float **audio = (float **)frame->extended_data;
int len = frame->nb_samples;
int window_index= s->frame_len_bits - s->block_len_bits;
FFTContext *mdct = &s->mdct_ctx[window_index];
int i, j, channel;
int ch;
const float * win = s->windows[window_index];
int window_len = 1 << s->block_len_bits;
float n = window_len/2;
float n = 2.0 * 32768.0 / window_len;
for (channel = 0; channel < avctx->channels; channel++) {
memcpy(s->output, s->frame_out[channel], sizeof(float)*window_len);
j = channel;
for (i = 0; i < len; i++, j += avctx->channels){
s->output[i+window_len] = audio[j] / n * win[window_len - i - 1];
s->frame_out[channel][i] = audio[j] / n * win[i];
}
mdct->mdct_calc(mdct, s->coefs[channel], s->output);
for (ch = 0; ch < avctx->channels; ch++) {
memcpy(s->output, s->frame_out[ch], window_len * sizeof(*s->output));
s->dsp.vector_fmul_scalar(s->frame_out[ch], audio[ch], n, len);
s->dsp.vector_fmul_reverse(&s->output[window_len], s->frame_out[ch], win, len);
s->fdsp.vector_fmul(s->frame_out[ch], s->frame_out[ch], win, len);
mdct->mdct_calc(mdct, s->coefs[ch], s->output);
}
}
@ -349,13 +350,12 @@ static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt,
const AVFrame *frame, int *got_packet_ptr)
{
WMACodecContext *s = avctx->priv_data;
const int16_t *samples = (const int16_t *)frame->data[0];
int i, total_gain, ret;
s->block_len_bits= s->frame_len_bits; //required by non variable block len
s->block_len = 1 << s->block_len_bits;
apply_window_and_mdct(avctx, samples, frame->nb_samples);
apply_window_and_mdct(avctx, frame);
if (s->ms_stereo) {
float a, b;
@ -426,7 +426,7 @@ AVCodec ff_wmav1_encoder = {
.init = encode_init,
.encode2 = encode_superframe,
.close = ff_wma_end,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
};
@ -439,7 +439,7 @@ AVCodec ff_wmav2_encoder = {
.init = encode_init,
.encode2 = encode_superframe,
.close = ff_wma_end,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
};