virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

BLOCK_SIZE is not used properly, just use numbers instead to avoid confusion

Browse Source 
Originally committed as revision 9822 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2007-07-28 20:50:25 +00:00
parent 7bfd22f25a
commit 8fbb368d2c
1 changed files with 8 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
libavcodec/ac3dec.c
View File

@ -76,8 +76,6 @@ static const float clevs[4] = { LEVEL_MINUS_3DB, LEVEL_MINUS_4POINT5DB,
static const float slevs[4] = { LEVEL_MINUS_3DB, LEVEL_MINUS_6DB, LEVEL_ZERO, LEVEL_MINUS_6DB };
#define BLOCK_SIZE 256
#define AC3_OUTPUT_LFEON 8
typedef struct {
@ -145,18 +143,18 @@ typedef struct {
uint8_t bap[5][256]; //fbw channel bit allocation pointers
uint8_t lfebap[256]; //lfe channel bit allocation pointers
DECLARE_ALIGNED_16(float, transform_coeffs[AC3_MAX_CHANNELS][BLOCK_SIZE]); //transform coefficients
DECLARE_ALIGNED_16(float, transform_coeffs[AC3_MAX_CHANNELS][256]); //transform coefficients
/* For IMDCT. */
MDCTContext imdct_512; //for 512 sample imdct transform
MDCTContext imdct_256; //for 256 sample imdct transform
DSPContext dsp; //for optimization
DECLARE_ALIGNED_16(float, output[AC3_MAX_CHANNELS][BLOCK_SIZE]); //output after imdct transform and windowing
DECLARE_ALIGNED_16(float, delay[AC3_MAX_CHANNELS][BLOCK_SIZE]); //delay - added to the next block
DECLARE_ALIGNED_16(float, tmp_imdct[BLOCK_SIZE]); //temporary storage for imdct transform
DECLARE_ALIGNED_16(float, tmp_output[BLOCK_SIZE * 2]); //temporary storage for output before windowing
DECLARE_ALIGNED_16(float, window[BLOCK_SIZE]); //window coefficients
DECLARE_ALIGNED_16(float, output[AC3_MAX_CHANNELS][256]); //output after imdct transform and windowing
DECLARE_ALIGNED_16(float, delay[AC3_MAX_CHANNELS][256]); //delay - added to the next block
DECLARE_ALIGNED_16(float, tmp_imdct[256]); //temporary storage for imdct transform
DECLARE_ALIGNED_16(float, tmp_output[512]); //temporary storage for output before windowing
DECLARE_ALIGNED_16(float, window[256]); //window coefficients
/* Miscellaneous. */
GetBitContext gb;
@ -1122,11 +1120,11 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
return ctx->frame_size;
}
start = (ctx->output_mode & AC3_OUTPUT_LFEON) ? 0 : 1;
for (k = 0; k < BLOCK_SIZE; k++)
for (k = 0; k < 256; k++)
for (j = start; j <= ctx->nfchans; j++)
*(out_samples++) = convert(int_ptr[j][k]);
}
*data_size = NB_BLOCKS * BLOCK_SIZE * avctx->channels * sizeof (int16_t);
*data_size = NB_BLOCKS * 256 * avctx->channels * sizeof (int16_t);
return ctx->frame_size;
}