diff options
author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-09-14 22:42:31 +0400 |
---|---|---|
committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-10-10 19:38:58 +0400 |
commit | f10524d51c1c957b58d0ceda171310caf9eaed96 (patch) | |
tree | 4b3ad43453ced7d7b989203b7cbc64fb20d70d9d /libavcodec | |
parent | cadd4d332a48d37d0248eafe955050f4f7d08eb5 (diff) |
ra144: use macro constants to make the code more understandable.
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/ra144.c | 40 | ||||
-rw-r--r-- | libavcodec/ra144dec.c | 18 |
2 files changed, 29 insertions, 29 deletions
diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c index fd2ed3299d..e6442d694d 100644 --- a/libavcodec/ra144.c +++ b/libavcodec/ra144.c @@ -1544,22 +1544,22 @@ void ff_copy_and_dup(int16_t *target, const int16_t *source, int offset) int ff_eval_refl(int *refl, const int16_t *coefs, AVCodecContext *avctx) { int b, i, j; - int buffer1[10]; - int buffer2[10]; + int buffer1[LPC_ORDER]; + int buffer2[LPC_ORDER]; int *bp1 = buffer1; int *bp2 = buffer2; - for (i=0; i < 10; i++) + for (i=0; i < LPC_ORDER; i++) buffer2[i] = coefs[i]; - refl[9] = bp2[9]; + refl[LPC_ORDER-1] = bp2[LPC_ORDER-1]; - if ((unsigned) bp2[9] + 0x1000 > 0x1fff) { + if ((unsigned) bp2[LPC_ORDER-1] + 0x1000 > 0x1fff) { av_log(avctx, AV_LOG_ERROR, "Overflow. Broken sample?\n"); return 1; } - for (i=8; i >= 0; i--) { + for (i = LPC_ORDER-2; i >= 0; i--) { b = 0x1000-((bp2[i+1] * bp2[i+1]) >> 12); if (!b) @@ -1584,12 +1584,12 @@ int ff_eval_refl(int *refl, const int16_t *coefs, AVCodecContext *avctx) */ void ff_eval_coefs(int *coefs, const int *refl) { - int buffer[10]; + int buffer[LPC_ORDER]; int *b1 = buffer; int *b2 = coefs; int i, j; - for (i=0; i < 10; i++) { + for (i=0; i < LPC_ORDER; i++) { b1[i] = refl[i] << 4; for (j=0; j < i; j++) @@ -1598,7 +1598,7 @@ void ff_eval_coefs(int *coefs, const int *refl) FFSWAP(int *, b1, b2); } - for (i=0; i < 10; i++) + for (i=0; i < LPC_ORDER; i++) coefs[i] >>= 4; } @@ -1606,7 +1606,7 @@ void ff_int_to_int16(int16_t *out, const int *inp) { int i; - for (i=0; i < 10; i++) + for (i = 0; i < LPC_ORDER; i++) *out++ = *inp++; } @@ -1629,9 +1629,9 @@ unsigned int ff_rms(const int *data) { int i; unsigned int res = 0x10000; - int b = 10; + int b = LPC_ORDER; - for (i=0; i < 10; i++) { + for (i = 0; i < LPC_ORDER; i++) { res = (((0x1000000 - data[i]*data[i]) >> 12) * res) >> 12; if (res == 0) @@ -1648,13 +1648,13 @@ unsigned int ff_rms(const int *data) int ff_interp(RA144Context *ractx, int16_t *out, int a, int copyold, int energy) { - int work[10]; + int work[LPC_ORDER]; int b = NBLOCKS - a; int i; // Interpolate block coefficients from the this frame's forth block and // last frame's forth block. - for (i=0; i<10; i++) + for (i = 0; i < LPC_ORDER; i++) out[i] = (a * ractx->lpc_coef[0][i] + b * ractx->lpc_coef[1][i])>> 2; if (ff_eval_refl(work, out, ractx->avctx)) { @@ -1690,7 +1690,7 @@ void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs, int cba_idx, int cb1_idx, int cb2_idx, int gval, int gain) { - uint16_t buffer_a[40]; + uint16_t buffer_a[BLOCKSIZE]; uint16_t *block; int m[3]; @@ -1711,10 +1711,10 @@ void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs, ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL, ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]); - memcpy(ractx->curr_sblock, ractx->curr_sblock + 40, - 10*sizeof(*ractx->curr_sblock)); + memcpy(ractx->curr_sblock, ractx->curr_sblock + BLOCKSIZE, + LPC_ORDER*sizeof(*ractx->curr_sblock)); - if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs, - block, BLOCKSIZE, 10, 1, 0xfff)) - memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock)); + if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + LPC_ORDER, lpc_coefs, + block, BLOCKSIZE, LPC_ORDER, 1, 0xfff)) + memset(ractx->curr_sblock, 0, (LPC_ORDER+BLOCKSIZE)*sizeof(*ractx->curr_sblock)); } diff --git a/libavcodec/ra144dec.c b/libavcodec/ra144dec.c index f026e24ccd..5fff696d83 100644 --- a/libavcodec/ra144dec.c +++ b/libavcodec/ra144dec.c @@ -59,10 +59,10 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata, { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; - static const uint8_t sizes[10] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2}; - unsigned int refl_rms[4]; // RMS of the reflection coefficients - uint16_t block_coefs[4][10]; // LPC coefficients of each sub-block - unsigned int lpc_refl[10]; // LPC reflection coefficients of the frame + static const uint8_t sizes[LPC_ORDER] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2}; + unsigned int refl_rms[NBLOCKS]; // RMS of the reflection coefficients + uint16_t block_coefs[NBLOCKS][LPC_ORDER]; // LPC coefficients of each sub-block + unsigned int lpc_refl[LPC_ORDER]; // LPC reflection coefficients of the frame int i, j; int out_size; int16_t *data = vdata; @@ -77,15 +77,15 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata, return AVERROR(EINVAL); } - if(buf_size < 20) { + if(buf_size < FRAMESIZE) { av_log(avctx, AV_LOG_ERROR, "Frame too small (%d bytes). Truncated file?\n", buf_size); *data_size = 0; return buf_size; } - init_get_bits(&gb, buf, 20 * 8); + init_get_bits(&gb, buf, FRAMESIZE * 8); - for (i=0; i<10; i++) + for (i = 0; i < LPC_ORDER; i++) lpc_refl[i] = ff_lpc_refl_cb[i][get_bits(&gb, sizes[i])]; ff_eval_coefs(ractx->lpc_coef[0], lpc_refl); @@ -102,7 +102,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata, ff_int_to_int16(block_coefs[3], ractx->lpc_coef[0]); - for (i=0; i < 4; i++) { + for (i=0; i < NBLOCKS; i++) { do_output_subblock(ractx, block_coefs[i], refl_rms[i], &gb); for (j=0; j < BLOCKSIZE; j++) @@ -115,7 +115,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *vdata, FFSWAP(unsigned int *, ractx->lpc_coef[0], ractx->lpc_coef[1]); *data_size = out_size; - return 20; + return FRAMESIZE; } AVCodec ff_ra_144_decoder = { |