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remove residual array, it isnt really needed

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Originally committed as revision 2792 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Michael Niedermayer 21 years ago
parent ac2570a8b0
commit 4fd125984b
1 changed files with 13 additions and 23 deletions
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  1. 34
      libavcodec/flac.c

34
libavcodec/flac.c
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@ -52,7 +52,6 @@ typedef struct FLACContext {
int bps, curr_bps; int bps, curr_bps;
enum channel_order order; enum channel_order order;
int32_t *residual[MAX_CHANNELS];
int32_t *decoded[MAX_CHANNELS]; int32_t *decoded[MAX_CHANNELS];
uint8_t *bitstream; uint8_t *bitstream;
int bitstream_size; int bitstream_size;
@ -120,7 +119,6 @@ static void allocate_buffers(FLACContext *s){
for (i = 0; i < s->channels; i++) for (i = 0; i < s->channels; i++)
{ {
s->decoded[i] = av_realloc(s->decoded[i], sizeof(int32_t)*s->max_blocksize); s->decoded[i] = av_realloc(s->decoded[i], sizeof(int32_t)*s->max_blocksize);
s->residual[i] = av_realloc(s->residual[i], sizeof(int32_t)*s->max_blocksize);
} }
s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize); s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize);
@ -176,13 +174,13 @@ static int decode_residuals(FLACContext *s, int channel, int pred_order)
av_log(s->avctx, AV_LOG_DEBUG, "fixed len partition\n"); av_log(s->avctx, AV_LOG_DEBUG, "fixed len partition\n");
tmp = get_bits(&s->gb, 5); tmp = get_bits(&s->gb, 5);
for (; i < samples; i++, sample++) for (; i < samples; i++, sample++)
s->residual[channel][sample] = get_sbits(&s->gb, tmp); s->decoded[channel][sample] = get_sbits(&s->gb, tmp);
} }
else else
{ {
// av_log(s->avctx, AV_LOG_DEBUG, "rice coded partition k=%d\n", tmp); // av_log(s->avctx, AV_LOG_DEBUG, "rice coded partition k=%d\n", tmp);
for (; i < samples; i++, sample++){ for (; i < samples; i++, sample++){
s->residual[channel][sample] = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0); s->decoded[channel][sample] = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0);
if(get_bits_count(&s->gb) > s->gb.size_in_bits){ if(get_bits_count(&s->gb) > s->gb.size_in_bits){
av_log(s->avctx, AV_LOG_ERROR, "fucking FLAC\n"); av_log(s->avctx, AV_LOG_ERROR, "fucking FLAC\n");
return -1; return -1;
@ -218,34 +216,28 @@ static int decode_subframe_fixed(FLACContext *s, int channel, int pred_order)
switch(pred_order) switch(pred_order)
{ {
case 0: case 0:
for (i = pred_order; i < s->blocksize; i++)
s->decoded[channel][i] = s->residual[channel][i];
break; break;
case 1: case 1:
for (i = pred_order; i < s->blocksize; i++) for (i = pred_order; i < s->blocksize; i++)
s->decoded[channel][i] = s->residual[channel][i] + s->decoded[channel][i] += s->decoded[channel][i-1];
s->decoded[channel][i-1];
break; break;
case 2: case 2:
for (i = pred_order; i < s->blocksize; i++) for (i = pred_order; i < s->blocksize; i++)
s->decoded[channel][i] = s->residual[channel][i] + s->decoded[channel][i] += 2*s->decoded[channel][i-1]
(s->decoded[channel][i-1] << 1) - - s->decoded[channel][i-2];
s->decoded[channel][i-2];
break; break;
case 3: case 3:
for (i = pred_order; i < s->blocksize; i++) for (i = pred_order; i < s->blocksize; i++)
s->decoded[channel][i] = s->residual[channel][i] + s->decoded[channel][i] += 3*s->decoded[channel][i-1]
3*(s->decoded[channel][i-1] - s->decoded[channel][i-2]) - 3*s->decoded[channel][i-2]
+ s->decoded[channel][i-3]; + s->decoded[channel][i-3];
break; break;
case 4: case 4:
for (i = pred_order; i < s->blocksize; i++) for (i = pred_order; i < s->blocksize; i++)
s->decoded[channel][i] = s->residual[channel][i] + s->decoded[channel][i] += 4*s->decoded[channel][i-1]
((s->decoded[channel][i-1] + - 6*s->decoded[channel][i-2]
s->decoded[channel][i-3]) << 2) - + 4*s->decoded[channel][i-3]
((s->decoded[channel][i-2] << 2) + - s->decoded[channel][i-4];
(s->decoded[channel][i-2] << 1)) -
s->decoded[channel][i-4];
break; break;
default: default:
av_log(s->avctx, AV_LOG_ERROR, "illegal pred order %d\n", pred_order); av_log(s->avctx, AV_LOG_ERROR, "illegal pred order %d\n", pred_order);
@ -296,7 +288,7 @@ assert(qlevel >= 0); //FIXME
sum = 0; sum = 0;
for (j = 0; j < pred_order; j++) for (j = 0; j < pred_order; j++)
sum += coeffs[j] * s->decoded[channel][i-j-1]; sum += coeffs[j] * s->decoded[channel][i-j-1];
s->decoded[channel][i] = s->residual[channel][i] + (sum >> qlevel); s->decoded[channel][i] += sum >> qlevel;
} }
return 0; return 0;
@ -502,7 +494,6 @@ static int decode_frame(FLACContext *s)
/* if (s->blocksize != s->last_blocksize) /* if (s->blocksize != s->last_blocksize)
{ {
s->decoded[i] = av_realloc(s->decoded[i], sizeof(uint32_t)*s->blocksize); s->decoded[i] = av_realloc(s->decoded[i], sizeof(uint32_t)*s->blocksize);
s->residual[i] = av_realloc(s->residual[i], sizeof(uint8_t)*s->blocksize);
}*/ }*/
// av_log(s->avctx, AV_LOG_DEBUG, "decoded: %x residual: %x\n", s->decoded[i], s->residual[i]); // av_log(s->avctx, AV_LOG_DEBUG, "decoded: %x residual: %x\n", s->decoded[i], s->residual[i]);
if (decode_subframe(s, i) < 0) if (decode_subframe(s, i) < 0)
@ -716,7 +707,6 @@ static int flac_decode_close(AVCodecContext *avctx)
for (i = 0; i < s->channels; i++) for (i = 0; i < s->channels; i++)
{ {
av_freep(&s->decoded[i]); av_freep(&s->decoded[i]);
av_freep(&s->residual[i]);
} }
av_freep(&s->bitstream); av_freep(&s->bitstream);

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