generic-library/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Cosmetics. Renames, indentation and spacing.

Browse Source 
Originally committed as revision 19832 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson 2009-09-13 18:05:14 +00:00
parent 72cdcc0b9b
commit 04a6d1b0db
1 changed files with 28 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
libavcodec/atrac1.c
View File

@ -94,7 +94,8 @@ static const uint16_t samples_per_band[3] = {128, 128, 256};
static const uint8_t mdct_long_nbits[3] = {7, 7, 8};
static void at1_imdct(AT1Ctx *q, float *spec, float *out, int nbits, int rev_spec)
static void at1_imdct(AT1Ctx *q, float *spec, float *out, int nbits,
int rev_spec)
{
MDCTContext* mdct_context;
int transf_size = 1 << nbits;
@ -104,9 +105,9 @@ static void at1_imdct(AT1Ctx *q, float *spec, float *out, int nbits, int rev_spe
if (rev_spec) {
int i;
for (i=0 ; i<transf_size/2 ; i++)
FFSWAP(float, spec[i], spec[transf_size-1-i]);
FFSWAP(float, spec[i], spec[transf_size - 1 - i]);
}
ff_imdct_half(mdct_context,out,spec);
ff_imdct_half(mdct_context, out, spec);
}
@ -147,7 +148,8 @@ static int at1_imdct_block(AT1SUCtx* su, AT1Ctx *q)
/* overlap and window between short blocks */
q->dsp.vector_fmul_window(&su->spectrum[0][ref_pos+start_pos],
&su->spectrum[0][ref_pos+start_pos],q->short_buf,short_window, 0, 16);
&su->spectrum[0][ref_pos+start_pos],
q->short_buf,short_window, 0, 16);
start_pos += 32; // use hardcoded block_size
pos += 32;
}
@ -166,8 +168,11 @@ static int at1_imdct_block(AT1SUCtx* su, AT1Ctx *q)
return 0;
}
/**
* Parse the block size mode byte
*/
static int at1_parse_block_size_mode(GetBitContext* gb, int log2_block_count[AT1_QMF_BANDS])
static int at1_parse_bsm(GetBitContext* gb, int log2_block_cnt[AT1_QMF_BANDS])
{
int log2_block_count_tmp, i;
@ -176,21 +181,22 @@ static int at1_parse_block_size_mode(GetBitContext* gb, int log2_block_count[AT1
log2_block_count_tmp = get_bits(gb, 2);
if (log2_block_count_tmp & 1)
return -1;
log2_block_count[i] = 2 - log2_block_count_tmp;
log2_block_cnt[i] = 2 - log2_block_count_tmp;
}
/* high band */
log2_block_count_tmp = get_bits(gb, 2);
if (log2_block_count_tmp != 0 && log2_block_count_tmp != 3)
return -1;
log2_block_count[IDX_HIGH_BAND] = 3 - log2_block_count_tmp;
log2_block_cnt[IDX_HIGH_BAND] = 3 - log2_block_count_tmp;
skip_bits(gb, 2);
return 0;
}
static int at1_unpack_dequant(GetBitContext* gb, AT1SUCtx* su, float spec[AT1_SU_SAMPLES])
static int at1_unpack_dequant(GetBitContext* gb, AT1SUCtx* su,
float spec[AT1_SU_SAMPLES])
{
int bits_used, band_num, bfu_num, i;
@ -234,7 +240,7 @@ static int at1_unpack_dequant(GetBitContext* gb, AT1SUCtx* su, float spec[AT1_SU
pos = su->log2_block_count[band_num] ? bfu_start_short[bfu_num] : bfu_start_long[bfu_num];
if (word_len) {
float max_quant = 1.0/(float)((1 << (word_len - 1)) - 1);
float max_quant = 1.0 / (float)((1 << (word_len - 1)) - 1);
for (i=0 ; i<num_specs ; i++) {
/* read in a quantized spec and convert it to
@ -261,21 +267,20 @@ void at1_subband_synthesis(AT1Ctx *q, AT1SUCtx* su, float *pOut)
atrac_iqmf(q->bands[0], q->bands[1], 128, temp, su->fst_qmf_delay, iqmf_temp);
/* delay the signal of the high band by 23 samples */
memcpy( su->last_qmf_delay, &su->last_qmf_delay[256], sizeof(float)*23);
memcpy(&su->last_qmf_delay[23], q->bands[2], sizeof(float)*256);
memcpy( su->last_qmf_delay, &su->last_qmf_delay[256], sizeof(float)*23);
memcpy(&su->last_qmf_delay[23], q->bands[2], sizeof(float)*256);
/* combine (low + middle) and high bands */
atrac_iqmf(temp, su->last_qmf_delay, 256, pOut, su->snd_qmf_delay, iqmf_temp);
}
static int atrac1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
static int atrac1_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AT1Ctx *q = avctx->priv_data;
int buf_size = avpkt->size;
AT1Ctx *q = avctx->priv_data;
int ch, ret, i;
GetBitContext gb;
float* samples = data;
@ -292,7 +297,7 @@ static int atrac1_decode_frame(AVCodecContext *avctx,
init_get_bits(&gb, &buf[212*ch], 212*8);
/* parse block_size_mode, 1st byte */
ret = at1_parse_block_size_mode(&gb, su->log2_block_count);
ret = at1_parse_bsm(&gb, su->log2_block_count);
if (ret < 0)
return ret;
@ -309,12 +314,15 @@ static int atrac1_decode_frame(AVCodecContext *avctx,
/* round, convert to 16bit and interleave */
if (q->channels == 1) {
/* mono */
q->dsp.vector_clipf(samples, q->out_samples[0], -32700./(1<<15), 32700./(1<<15), AT1_SU_SAMPLES);
q->dsp.vector_clipf(samples, q->out_samples[0], -32700.0 / (1<<15),
32700.0 / (1<<15), AT1_SU_SAMPLES);
} else {
/* stereo */
for (i = 0; i < AT1_SU_SAMPLES; i++) {
samples[i*2] = av_clipf(q->out_samples[0][i], -32700./(1<<15), 32700./(1<<15));
samples[i*2+1] = av_clipf(q->out_samples[1][i], -32700./(1<<15), 32700./(1<<15));
samples[i*2] = av_clipf(q->out_samples[0][i], -32700.0 / (1<<15),
32700.0 / (1<<15));
samples[i*2+1] = av_clipf(q->out_samples[1][i], -32700.0 / (1<<15),
32700.0 / (1<<15));
}
}