#include "fmtconvert.h"
#include "sinewin.h"
-#define ALT_BITSTREAM_READER_LE
+#define BITSTREAM_READER_LE
#include "get_bits.h"
typedef struct NellyMoserDecodeContext {
AVCodecContext* avctx;
+ AVFrame frame;
float *float_buf;
- float state[NELLY_BUF_LEN];
AVLFG random_state;
GetBitContext gb;
float scale_bias;
DSPContext dsp;
FFTContext imdct_ctx;
FmtConvertContext fmt_conv;
- DECLARE_ALIGNED(32, float, imdct_out)[NELLY_BUF_LEN * 2];
+ DECLARE_ALIGNED(32, float, imdct_buf)[2][NELLY_BUF_LEN];
+ float *imdct_out;
+ float *imdct_prev;
} NellyMoserDecodeContext;
-static void overlap_and_window(NellyMoserDecodeContext *s, float *state, float *audio, float *a_in)
-{
- int bot, top;
-
- bot = 0;
- top = NELLY_BUF_LEN-1;
-
- while (bot < NELLY_BUF_LEN) {
- audio[bot] = a_in [bot]*ff_sine_128[bot]
- +state[bot]*ff_sine_128[top];
-
- bot++;
- top--;
- }
- memcpy(state, a_in + NELLY_BUF_LEN, sizeof(float)*NELLY_BUF_LEN);
-}
-
static void nelly_decode_block(NellyMoserDecodeContext *s,
const unsigned char block[NELLY_BLOCK_LEN],
float audio[NELLY_SAMPLES])
memset(&aptr[NELLY_FILL_LEN], 0,
(NELLY_BUF_LEN - NELLY_FILL_LEN) * sizeof(float));
- s->imdct_ctx.imdct_calc(&s->imdct_ctx, s->imdct_out, aptr);
- /* XXX: overlapping and windowing should be part of a more
- generic imdct function */
- overlap_and_window(s, s->state, aptr, s->imdct_out);
+ s->imdct_ctx.imdct_half(&s->imdct_ctx, s->imdct_out, aptr);
+ s->dsp.vector_fmul_window(aptr, s->imdct_prev + NELLY_BUF_LEN/2, s->imdct_out, ff_sine_128, NELLY_BUF_LEN/2);
+ FFSWAP(float *, s->imdct_out, s->imdct_prev);
}
}
NellyMoserDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
+ s->imdct_out = s->imdct_buf[0];
+ s->imdct_prev = s->imdct_buf[1];
av_lfg_init(&s->random_state, 0);
ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
- dsputil_init(&s->dsp, avctx);
+ ff_dsputil_init(&s->dsp, avctx);
if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
s->scale_bias = 1.0/(32768*8);
ff_init_ff_sine_windows(7);
avctx->channel_layout = AV_CH_LAYOUT_MONO;
+
+ avcodec_get_frame_defaults(&s->frame);
+ avctx->coded_frame = &s->frame;
+
return 0;
}
-static int decode_tag(AVCodecContext * avctx,
- void *data, int *data_size,
- AVPacket *avpkt) {
+static int decode_tag(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
+{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
NellyMoserDecodeContext *s = avctx->priv_data;
- int blocks, i, block_size;
- int16_t *samples_s16 = data;
- float *samples_flt = data;
+ int blocks, i, ret;
+ int16_t *samples_s16;
+ float *samples_flt;
- block_size = NELLY_SAMPLES * av_get_bytes_per_sample(avctx->sample_fmt);
blocks = buf_size / NELLY_BLOCK_LEN;
if (blocks <= 0) {
av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
return AVERROR_INVALIDDATA;
}
- if (*data_size < blocks * block_size) {
- av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
- return AVERROR(EINVAL);
- }
if (buf_size % NELLY_BLOCK_LEN) {
av_log(avctx, AV_LOG_WARNING, "Leftover bytes: %d.\n",
buf_size % NELLY_BLOCK_LEN);
* 44100 Hz - 8
*/
+ /* get output buffer */
+ s->frame.nb_samples = NELLY_SAMPLES * blocks;
+ if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples_s16 = (int16_t *)s->frame.data[0];
+ samples_flt = (float *)s->frame.data[0];
+
for (i=0 ; i<blocks ; i++) {
- if (avctx->sample_fmt == SAMPLE_FMT_FLT) {
+ if (avctx->sample_fmt == AV_SAMPLE_FMT_FLT) {
nelly_decode_block(s, buf, samples_flt);
samples_flt += NELLY_SAMPLES;
} else {
}
buf += NELLY_BLOCK_LEN;
}
- *data_size = blocks * block_size;
+
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = s->frame;
return buf_size;
}
av_freep(&s->float_buf);
ff_mdct_end(&s->imdct_ctx);
+
return 0;
}
AVCodec ff_nellymoser_decoder = {
.name = "nellymoser",
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_NELLYMOSER,
+ .id = AV_CODEC_ID_NELLYMOSER,
.priv_data_size = sizeof(NellyMoserDecodeContext),
.init = decode_init,
.close = decode_end,
.decode = decode_tag,
- .long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE,
+ .long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
};
-