*/
/**
- * @file libavcodec/nellymoserdec.c
+ * @file
* The 3 alphanumeric copyright notices are md5summed they are from the original
* implementors. The original code is available from http://code.google.com/p/nelly2pcm/
*/
#include "nellymoser.h"
#include "libavutil/lfg.h"
#include "libavutil/random_seed.h"
+#include "libavcore/audioconvert.h"
#include "avcodec.h"
#include "dsputil.h"
+#include "fft.h"
#define ALT_BITSTREAM_READER_LE
#include "get_bits.h"
typedef struct NellyMoserDecodeContext {
AVCodecContext* avctx;
- DECLARE_ALIGNED_16(float,float_buf[NELLY_SAMPLES]);
+ DECLARE_ALIGNED(16, float,float_buf)[NELLY_SAMPLES];
float state[128];
AVLFG random_state;
GetBitContext gb;
- int add_bias;
float scale_bias;
DSPContext dsp;
- MDCTContext imdct_ctx;
- DECLARE_ALIGNED_16(float,imdct_out[NELLY_BUF_LEN * 2]);
+ FFTContext imdct_ctx;
+ DECLARE_ALIGNED(16, float,imdct_out)[NELLY_BUF_LEN * 2];
} NellyMoserDecodeContext;
static void overlap_and_window(NellyMoserDecodeContext *s, float *state, float *audio, float *a_in)
while (bot < NELLY_BUF_LEN) {
audio[bot] = a_in [bot]*ff_sine_128[bot]
- +state[bot]*ff_sine_128[top] + s->add_bias;
+ +state[bot]*ff_sine_128[top];
bot++;
top--;
NellyMoserDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
- av_lfg_init(&s->random_state, ff_random_get_seed());
+ av_lfg_init(&s->random_state, 0);
ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
dsputil_init(&s->dsp, avctx);
- if(s->dsp.float_to_int16 == ff_float_to_int16_c) {
- s->add_bias = 385;
- s->scale_bias = 1.0/(8*32768);
- } else {
- s->add_bias = 0;
- s->scale_bias = 1.0/(1*8);
- }
+ s->scale_bias = 1.0/(1*8);
/* Generate overlap window */
if (!ff_sine_128[127])
- ff_sine_window_init(ff_sine_128, 128);
+ ff_init_ff_sine_windows(7);
- avctx->sample_fmt = SAMPLE_FMT_S16;
- avctx->channel_layout = CH_LAYOUT_MONO;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->channel_layout = AV_CH_LAYOUT_MONO;
return 0;
}
if (buf_size < avctx->block_align)
return buf_size;
- switch (buf_size) {
- case 64: // 8000Hz
- blocks = 1; break;
- case 128: // 11025Hz
- blocks = 2; break;
- case 192: // 16000Hz
- blocks = 3; break;
- case 256: // 22050Hz
- blocks = 4; break;
- case 512: // 44100Hz
- blocks = 8; break;
- default:
- av_log(avctx, AV_LOG_DEBUG, "Tag size %d.\n", buf_size);
- return buf_size;
+ if (buf_size % 64) {
+ av_log(avctx, AV_LOG_ERROR, "Tag size %d.\n", buf_size);
+ return buf_size;
}
+ blocks = buf_size / 64;
+ /* Normal numbers of blocks for sample rates:
+ * 8000 Hz - 1
+ * 11025 Hz - 2
+ * 16000 Hz - 3
+ * 22050 Hz - 4
+ * 44100 Hz - 8
+ */
for (i=0 ; i<blocks ; i++) {
nelly_decode_block(s, &buf[i*NELLY_BLOCK_LEN], s->float_buf);
return 0;
}
-AVCodec nellymoser_decoder = {
+AVCodec ff_nellymoser_decoder = {
"nellymoser",
- CODEC_TYPE_AUDIO,
+ AVMEDIA_TYPE_AUDIO,
CODEC_ID_NELLYMOSER,
sizeof(NellyMoserDecodeContext),
decode_init,