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author | Diego Biurrun <diego@biurrun.de> | 2005-12-22 01:10:11 +0000 |
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committer | Diego Biurrun <diego@biurrun.de> | 2005-12-22 01:10:11 +0000 |
commit | bb270c0896b39e1ae9277355e3c120ed3feb64a3 (patch) | |
tree | fc2fc2b1216d19acb3879abb6ea5a3b400f43fe4 /libavcodec/sonic.c | |
parent | 50827fcf44f34521df4708cdb633809b56fb9df3 (diff) | |
download | ffmpeg-streaming-bb270c0896b39e1ae9277355e3c120ed3feb64a3.zip ffmpeg-streaming-bb270c0896b39e1ae9277355e3c120ed3feb64a3.tar.gz |
COSMETICS: tabs --> spaces, some prettyprinting
Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/sonic.c')
-rw-r--r-- | libavcodec/sonic.c | 670 |
1 files changed, 335 insertions, 335 deletions
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c index 2f083e2..753b917 100644 --- a/libavcodec/sonic.c +++ b/libavcodec/sonic.c @@ -64,20 +64,20 @@ typedef struct SonicContext { int *predictor_state[MAX_CHANNELS]; } SonicContext; -#define LATTICE_SHIFT 10 -#define SAMPLE_SHIFT 4 -#define LATTICE_FACTOR (1 << LATTICE_SHIFT) -#define SAMPLE_FACTOR (1 << SAMPLE_SHIFT) +#define LATTICE_SHIFT 10 +#define SAMPLE_SHIFT 4 +#define LATTICE_FACTOR (1 << LATTICE_SHIFT) +#define SAMPLE_FACTOR (1 << SAMPLE_SHIFT) -#define BASE_QUANT 0.6 -#define RATE_VARIATION 3.0 +#define BASE_QUANT 0.6 +#define RATE_VARIATION 3.0 static inline int divide(int a, int b) { if (a < 0) - return -( (-a + b/2)/b ); + return -( (-a + b/2)/b ); else - return (a + b/2)/b; + return (a + b/2)/b; } static inline int shift(int a,int b) @@ -96,7 +96,7 @@ static inline int intlist_write(PutBitContext *pb, int *buf, int entries, int ba int i; for (i = 0; i < entries; i++) - set_se_golomb(pb, buf[i]); + set_se_golomb(pb, buf[i]); return 1; } @@ -106,7 +106,7 @@ static inline int intlist_read(GetBitContext *gb, int *buf, int entries, int bas int i; for (i = 0; i < entries; i++) - buf[i] = get_se_golomb(gb); + buf[i] = get_se_golomb(gb); return 1; } @@ -121,8 +121,8 @@ static int bits_to_store(uint64_t x) while(x) { - res++; - x >>= 1; + res++; + x >>= 1; } return res; } @@ -132,15 +132,15 @@ static void write_uint_max(PutBitContext *pb, unsigned int value, unsigned int m int i, bits; if (!max) - return; + return; bits = bits_to_store(max); for (i = 0; i < bits-1; i++) - put_bits(pb, 1, value & (1 << i)); + put_bits(pb, 1, value & (1 << i)); if ( (value | (1 << (bits-1))) <= max) - put_bits(pb, 1, value & (1 << (bits-1))); + put_bits(pb, 1, value & (1 << (bits-1))); } static unsigned int read_uint_max(GetBitContext *gb, int max) @@ -148,17 +148,17 @@ static unsigned int read_uint_max(GetBitContext *gb, int max) int i, bits, value = 0; if (!max) - return 0; + return 0; bits = bits_to_store(max); for (i = 0; i < bits-1; i++) - if (get_bits1(gb)) - value += 1 << i; + if (get_bits1(gb)) + value += 1 << i; if ( (value | (1<<(bits-1))) <= max) - if (get_bits1(gb)) - value += 1 << (bits-1); + if (get_bits1(gb)) + value += 1 << (bits-1); return value; } @@ -171,88 +171,88 @@ static int intlist_write(PutBitContext *pb, int *buf, int entries, int base_2_pa copy = av_mallocz(4* entries); if (!copy) - return -1; + return -1; if (base_2_part) { - int energy = 0; + int energy = 0; - for (i = 0; i < entries; i++) - energy += abs(buf[i]); + for (i = 0; i < entries; i++) + energy += abs(buf[i]); - low_bits = bits_to_store(energy / (entries * 2)); - if (low_bits > 15) - low_bits = 15; + low_bits = bits_to_store(energy / (entries * 2)); + if (low_bits > 15) + low_bits = 15; - put_bits(pb, 4, low_bits); + put_bits(pb, 4, low_bits); } for (i = 0; i < entries; i++) { - put_bits(pb, low_bits, abs(buf[i])); - copy[i] = abs(buf[i]) >> low_bits; - if (copy[i] > max) - max = abs(copy[i]); + put_bits(pb, low_bits, abs(buf[i])); + copy[i] = abs(buf[i]) >> low_bits; + if (copy[i] > max) + max = abs(copy[i]); } bits = av_mallocz(4* entries*max); if (!bits) { -// av_free(copy); - return -1; +// av_free(copy); + return -1; } for (i = 0; i <= max; i++) { - for (j = 0; j < entries; j++) - if (copy[j] >= i) - bits[x++] = copy[j] > i; + for (j = 0; j < entries; j++) + if (copy[j] >= i) + bits[x++] = copy[j] > i; } // store bitstream while (pos < x) { - int steplet = step >> 8; + int steplet = step >> 8; - if (pos + steplet > x) - steplet = x - pos; + if (pos + steplet > x) + steplet = x - pos; - for (i = 0; i < steplet; i++) - if (bits[i+pos] != dominant) - any = 1; + for (i = 0; i < steplet; i++) + if (bits[i+pos] != dominant) + any = 1; - put_bits(pb, 1, any); + put_bits(pb, 1, any); - if (!any) - { - pos += steplet; - step += step / ADAPT_LEVEL; - } - else - { - int interloper = 0; + if (!any) + { + pos += steplet; + step += step / ADAPT_LEVEL; + } + else + { + int interloper = 0; - while (((pos + interloper) < x) && (bits[pos + interloper] == dominant)) - interloper++; + while (((pos + interloper) < x) && (bits[pos + interloper] == dominant)) + interloper++; - // note change - write_uint_max(pb, interloper, (step >> 8) - 1); + // note change + write_uint_max(pb, interloper, (step >> 8) - 1); - pos += interloper + 1; - step -= step / ADAPT_LEVEL; - } + pos += interloper + 1; + step -= step / ADAPT_LEVEL; + } - if (step < 256) - { - step = 65536 / step; - dominant = !dominant; - } + if (step < 256) + { + step = 65536 / step; + dominant = !dominant; + } } // store signs for (i = 0; i < entries; i++) - if (buf[i]) - put_bits(pb, 1, buf[i] < 0); + if (buf[i]) + put_bits(pb, 1, buf[i] < 0); // av_free(bits); // av_free(copy); @@ -268,90 +268,90 @@ static int intlist_read(GetBitContext *gb, int *buf, int entries, int base_2_par int *bits = av_mallocz(4* entries); if (!bits) - return -1; + return -1; if (base_2_part) { - low_bits = get_bits(gb, 4); + low_bits = get_bits(gb, 4); - if (low_bits) - for (i = 0; i < entries; i++) - buf[i] = get_bits(gb, low_bits); + if (low_bits) + for (i = 0; i < entries; i++) + buf[i] = get_bits(gb, low_bits); } // av_log(NULL, AV_LOG_INFO, "entries: %d, low bits: %d\n", entries, low_bits); while (n_zeros < entries) { - int steplet = step >> 8; + int steplet = step >> 8; - if (!get_bits1(gb)) - { - for (i = 0; i < steplet; i++) - bits[x++] = dominant; + if (!get_bits1(gb)) + { + for (i = 0; i < steplet; i++) + bits[x++] = dominant; - if (!dominant) - n_zeros += steplet; + if (!dominant) + n_zeros += steplet; - step += step / ADAPT_LEVEL; - } - else - { - int actual_run = read_uint_max(gb, steplet-1); + step += step / ADAPT_LEVEL; + } + else + { + int actual_run = read_uint_max(gb, steplet-1); -// av_log(NULL, AV_LOG_INFO, "actual run: %d\n", actual_run); +// av_log(NULL, AV_LOG_INFO, "actual run: %d\n", actual_run); - for (i = 0; i < actual_run; i++) - bits[x++] = dominant; + for (i = 0; i < actual_run; i++) + bits[x++] = dominant; - bits[x++] = !dominant; + bits[x++] = !dominant; - if (!dominant) - n_zeros += actual_run; - else - n_zeros++; + if (!dominant) + n_zeros += actual_run; + else + n_zeros++; - step -= step / ADAPT_LEVEL; - } + step -= step / ADAPT_LEVEL; + } - if (step < 256) - { - step = 65536 / step; - dominant = !dominant; - } + if (step < 256) + { + step = 65536 / step; + dominant = !dominant; + } } // reconstruct unsigned values n_zeros = 0; for (i = 0; n_zeros < entries; i++) { - while(1) - { - if (pos >= entries) - { - pos = 0; - level += 1 << low_bits; - } + while(1) + { + if (pos >= entries) + { + pos = 0; + level += 1 << low_bits; + } - if (buf[pos] >= level) - break; + if (buf[pos] >= level) + break; - pos++; - } + pos++; + } - if (bits[i]) - buf[pos] += 1 << low_bits; - else - n_zeros++; + if (bits[i]) + buf[pos] += 1 << low_bits; + else + n_zeros++; - pos++; + pos++; } // av_free(bits); // read signs for (i = 0; i < entries; i++) - if (buf[i] && get_bits1(gb)) - buf[i] = -buf[i]; + if (buf[i] && get_bits1(gb)) + buf[i] = -buf[i]; // av_log(NULL, AV_LOG_INFO, "zeros: %d pos: %d\n", n_zeros, pos); @@ -365,14 +365,14 @@ static void predictor_init_state(int *k, int *state, int order) for (i = order-2; i >= 0; i--) { - int j, p, x = state[i]; + int j, p, x = state[i]; - for (j = 0, p = i+1; p < order; j++,p++) - { - int tmp = x + shift_down(k[j] * state[p], LATTICE_SHIFT); - state[p] += shift_down(k[j]*x, LATTICE_SHIFT); - x = tmp; - } + for (j = 0, p = i+1; p < order; j++,p++) + { + int tmp = x + shift_down(k[j] * state[p], LATTICE_SHIFT); + state[p] += shift_down(k[j]*x, LATTICE_SHIFT); + x = tmp; + } } } @@ -382,18 +382,18 @@ static int predictor_calc_error(int *k, int *state, int order, int error) #if 1 int *k_ptr = &(k[order-2]), - *state_ptr = &(state[order-2]); + *state_ptr = &(state[order-2]); for (i = order-2; i >= 0; i--, k_ptr--, state_ptr--) { - int k_value = *k_ptr, state_value = *state_ptr; - x -= shift_down(k_value * state_value, LATTICE_SHIFT); - state_ptr[1] = state_value + shift_down(k_value * x, LATTICE_SHIFT); + int k_value = *k_ptr, state_value = *state_ptr; + x -= shift_down(k_value * state_value, LATTICE_SHIFT); + state_ptr[1] = state_value + shift_down(k_value * x, LATTICE_SHIFT); } #else for (i = order-2; i >= 0; i--) { - x -= shift_down(k[i] * state[i], LATTICE_SHIFT); - state[i+1] = state[i] + shift_down(k[i] * x, LATTICE_SHIFT); + x -= shift_down(k[i] * state[i], LATTICE_SHIFT); + state[i+1] = state[i] + shift_down(k[i] * x, LATTICE_SHIFT); } #endif @@ -411,7 +411,7 @@ static int predictor_calc_error(int *k, int *state, int order, int error) // actual whitened result as it goes. static void modified_levinson_durbin(int *window, int window_entries, - int *out, int out_entries, int channels, int *tap_quant) + int *out, int out_entries, int channels, int *tap_quant) { int i; int *state = av_mallocz(4* window_entries); @@ -420,57 +420,57 @@ static void modified_levinson_durbin(int *window, int window_entries, for (i = 0; i < out_entries; i++) { - int step = (i+1)*channels, k, j; - double xx = 0.0, xy = 0.0; + int step = (i+1)*channels, k, j; + double xx = 0.0, xy = 0.0; #if 1 - int *x_ptr = &(window[step]), *state_ptr = &(state[0]); - j = window_entries - step; - for (;j>=0;j--,x_ptr++,state_ptr++) - { - double x_value = *x_ptr, state_value = *state_ptr; - xx += state_value*state_value; - xy += x_value*state_value; - } + int *x_ptr = &(window[step]), *state_ptr = &(state[0]); + j = window_entries - step; + for (;j>=0;j--,x_ptr++,state_ptr++) + { + double x_value = *x_ptr, state_value = *state_ptr; + xx += state_value*state_value; + xy += x_value*state_value; + } #else - for (j = 0; j <= (window_entries - step); j++); - { - double stepval = window[step+j], stateval = window[j]; -// xx += (double)window[j]*(double)window[j]; -// xy += (double)window[step+j]*(double)window[j]; - xx += stateval*stateval; - xy += stepval*stateval; - } + for (j = 0; j <= (window_entries - step); j++); + { + double stepval = window[step+j], stateval = window[j]; +// xx += (double)window[j]*(double)window[j]; +// xy += (double)window[step+j]*(double)window[j]; + xx += stateval*stateval; + xy += stepval*stateval; + } #endif - if (xx == 0.0) - k = 0; - else - k = (int)(floor(-xy/xx * (double)LATTICE_FACTOR / (double)(tap_quant[i]) + 0.5)); + if (xx == 0.0) + k = 0; + else + k = (int)(floor(-xy/xx * (double)LATTICE_FACTOR / (double)(tap_quant[i]) + 0.5)); - if (k > (LATTICE_FACTOR/tap_quant[i])) - k = LATTICE_FACTOR/tap_quant[i]; - if (-k > (LATTICE_FACTOR/tap_quant[i])) - k = -(LATTICE_FACTOR/tap_quant[i]); + if (k > (LATTICE_FACTOR/tap_quant[i])) + k = LATTICE_FACTOR/tap_quant[i]; + if (-k > (LATTICE_FACTOR/tap_quant[i])) + k = -(LATTICE_FACTOR/tap_quant[i]); - out[i] = k; - k *= tap_quant[i]; + out[i] = k; + k *= tap_quant[i]; #if 1 - x_ptr = &(window[step]); - state_ptr = &(state[0]); - j = window_entries - step; - for (;j>=0;j--,x_ptr++,state_ptr++) - { - int x_value = *x_ptr, state_value = *state_ptr; - *x_ptr = x_value + shift_down(k*state_value,LATTICE_SHIFT); - *state_ptr = state_value + shift_down(k*x_value, LATTICE_SHIFT); - } + x_ptr = &(window[step]); + state_ptr = &(state[0]); + j = window_entries - step; + for (;j>=0;j--,x_ptr++,state_ptr++) + { + int x_value = *x_ptr, state_value = *state_ptr; + *x_ptr = x_value + shift_down(k*state_value,LATTICE_SHIFT); + *state_ptr = state_value + shift_down(k*x_value, LATTICE_SHIFT); + } #else - for (j=0; j <= (window_entries - step); j++) - { - int stepval = window[step+j], stateval=state[j]; - window[step+j] += shift_down(k * stateval, LATTICE_SHIFT); - state[j] += shift_down(k * stepval, LATTICE_SHIFT); - } + for (j=0; j <= (window_entries - step); j++) + { + int stepval = window[step+j], stateval=state[j]; + window[step+j] += shift_down(k * stateval, LATTICE_SHIFT); + state[j] += shift_down(k * stepval, LATTICE_SHIFT); + } #endif } @@ -486,15 +486,15 @@ static inline int code_samplerate(int samplerate) { switch (samplerate) { - case 44100: return 0; - case 22050: return 1; - case 11025: return 2; - case 96000: return 3; - case 48000: return 4; - case 32000: return 5; - case 24000: return 6; - case 16000: return 7; - case 8000: return 8; + case 44100: return 0; + case 22050: return 1; + case 11025: return 2; + case 96000: return 3; + case 48000: return 4; + case 32000: return 5; + case 24000: return 6; + case 16000: return 7; + case 8000: return 8; } return -1; } @@ -507,39 +507,39 @@ static int sonic_encode_init(AVCodecContext *avctx) if (avctx->channels > MAX_CHANNELS) { - av_log(avctx, AV_LOG_ERROR, "Only mono and stereo streams are supported by now\n"); + av_log(avctx, AV_LOG_ERROR, "Only mono and stereo streams are supported by now\n"); return -1; /* only stereo or mono for now */ } if (avctx->channels == 2) - s->decorrelation = MID_SIDE; + s->decorrelation = MID_SIDE; if (avctx->codec->id == CODEC_ID_SONIC_LS) { - s->lossless = 1; - s->num_taps = 32; - s->downsampling = 1; - s->quantization = 0.0; + s->lossless = 1; + s->num_taps = 32; + s->downsampling = 1; + s->quantization = 0.0; } else { - s->num_taps = 128; - s->downsampling = 2; - s->quantization = 1.0; + s->num_taps = 128; + s->downsampling = 2; + s->quantization = 1.0; } // max tap 2048 if ((s->num_taps < 32) || (s->num_taps > 1024) || - ((s->num_taps>>5)<<5 != s->num_taps)) + ((s->num_taps>>5)<<5 != s->num_taps)) { - av_log(avctx, AV_LOG_ERROR, "Invalid number of taps\n"); - return -1; + av_log(avctx, AV_LOG_ERROR, "Invalid number of taps\n"); + return -1; } // generate taps s->tap_quant = av_mallocz(4* s->num_taps); for (i = 0; i < s->num_taps; i++) - s->tap_quant[i] = (int)(sqrt(i+1)); + s->tap_quant[i] = (int)(sqrt(i+1)); s->channels = avctx->channels; s->samplerate = avctx->sample_rate; @@ -549,18 +549,18 @@ static int sonic_encode_init(AVCodecContext *avctx) s->tail = av_mallocz(4* s->num_taps*s->channels); if (!s->tail) - return -1; + return -1; s->tail_size = s->num_taps*s->channels; s->predictor_k = av_mallocz(4 * s->num_taps); if (!s->predictor_k) - return -1; + return -1; for (i = 0; i < s->channels; i++) { - s->coded_samples[i] = av_mallocz(4* s->block_align); - if (!s->coded_samples[i]) - return -1; + s->coded_samples[i] = av_mallocz(4* s->block_align); + if (!s->coded_samples[i]) + return -1; } s->int_samples = av_mallocz(4* s->frame_size); @@ -568,22 +568,22 @@ static int sonic_encode_init(AVCodecContext *avctx) s->window_size = ((2*s->tail_size)+s->frame_size); s->window = av_mallocz(4* s->window_size); if (!s->window) - return -1; + return -1; avctx->extradata = av_mallocz(16); if (!avctx->extradata) - return -1; + return -1; init_put_bits(&pb, avctx->extradata, 16*8); put_bits(&pb, 2, version); // version if (version == 1) { - put_bits(&pb, 2, s->channels); - put_bits(&pb, 4, code_samplerate(s->samplerate)); + put_bits(&pb, 2, s->channels); + put_bits(&pb, 4, code_samplerate(s->samplerate)); } put_bits(&pb, 1, s->lossless); if (!s->lossless) - put_bits(&pb, 3, SAMPLE_SHIFT); // XXX FIXME: sample precision + put_bits(&pb, 3, SAMPLE_SHIFT); // XXX FIXME: sample precision put_bits(&pb, 2, s->decorrelation); put_bits(&pb, 2, s->downsampling); put_bits(&pb, 5, (s->num_taps >> 5)-1); // 32..1024 @@ -593,11 +593,11 @@ static int sonic_encode_init(AVCodecContext *avctx) avctx->extradata_size = put_bits_count(&pb)/8; av_log(avctx, AV_LOG_INFO, "Sonic: ver: %d ls: %d dr: %d taps: %d block: %d frame: %d downsamp: %d\n", - version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling); + version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling); avctx->coded_frame = avcodec_alloc_frame(); if (!avctx->coded_frame) - return -ENOMEM; + return -ENOMEM; avctx->coded_frame->key_frame = 1; avctx->frame_size = s->block_align*s->downsampling; @@ -612,7 +612,7 @@ static int sonic_encode_close(AVCodecContext *avctx) av_freep(&avctx->coded_frame); for (i = 0; i < s->channels; i++) - av_free(s->coded_samples[i]); + av_free(s->coded_samples[i]); av_free(s->predictor_k); av_free(s->tail); @@ -624,7 +624,7 @@ static int sonic_encode_close(AVCodecContext *avctx) } static int sonic_encode_frame(AVCodecContext *avctx, - uint8_t *buf, int buf_size, void *data) + uint8_t *buf, int buf_size, void *data) { SonicContext *s = avctx->priv_data; PutBitContext pb; @@ -635,108 +635,108 @@ static int sonic_encode_frame(AVCodecContext *avctx, // short -> internal for (i = 0; i < s->frame_size; i++) - s->int_samples[i] = samples[i]; + s->int_samples[i] = samples[i]; if (!s->lossless) - for (i = 0; i < s->frame_size; i++) - s->int_samples[i] = s->int_samples[i] << SAMPLE_SHIFT; + for (i = 0; i < s->frame_size; i++) + s->int_samples[i] = s->int_samples[i] << SAMPLE_SHIFT; switch(s->decorrelation) { - case MID_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - { - s->int_samples[i] += s->int_samples[i+1]; - s->int_samples[i+1] -= shift(s->int_samples[i], 1); - } - break; - case LEFT_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - s->int_samples[i+1] -= s->int_samples[i]; - break; - case RIGHT_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - s->int_samples[i] -= s->int_samples[i+1]; - break; + case MID_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + { + s->int_samples[i] += s->int_samples[i+1]; + s->int_samples[i+1] -= shift(s->int_samples[i], 1); + } + break; + case LEFT_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + s->int_samples[i+1] -= s->int_samples[i]; + break; + case RIGHT_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + s->int_samples[i] -= s->int_samples[i+1]; + break; } memset(s->window, 0, 4* s->window_size); for (i = 0; i < s->tail_size; i++) - s->window[x++] = s->tail[i]; + s->window[x++] = s->tail[i]; for (i = 0; i < s->frame_size; i++) - s->window[x++] = s->int_samples[i]; + s->window[x++] = s->int_samples[i]; for (i = 0; i < s->tail_size; i++) - s->window[x++] = 0; + s->window[x++] = 0; for (i = 0; i < s->tail_size; i++) - s->tail[i] = s->int_samples[s->frame_size - s->tail_size + i]; + s->tail[i] = s->int_samples[s->frame_size - s->tail_size + i]; // generate taps modified_levinson_durbin(s->window, s->window_size, - s->predictor_k, s->num_taps, s->channels, s->tap_quant); + s->predictor_k, s->num_taps, s->channels, s->tap_quant); if (intlist_write(&pb, s->predictor_k, s->num_taps, 0) < 0) - return -1; + return -1; for (ch = 0; ch < s->channels; ch++) { - x = s->tail_size+ch; - for (i = 0; i < s->block_align; i++) - { - int sum = 0; - for (j = 0; j < s->downsampling; j++, x += s->channels) - sum += s->window[x]; - s->coded_samples[ch][i] = sum; - } + x = s->tail_size+ch; + for (i = 0; i < s->block_align; i++) + { + int sum = 0; + for (j = 0; j < s->downsampling; j++, x += s->channels) + sum += s->window[x]; + s->coded_samples[ch][i] = sum; + } } // simple rate control code if (!s->lossless) { - double energy1 = 0.0, energy2 = 0.0; - for (ch = 0; ch < s->channels; ch++) - { - for (i = 0; i < s->block_align; i++) - { - double sample = s->coded_samples[ch][i]; - energy2 += sample*sample; - energy1 += fabs(sample); - } - } + double energy1 = 0.0, energy2 = 0.0; + for (ch = 0; ch < s->channels; ch++) + { + for (i = 0; i < s->block_align; i++) + { + double sample = s->coded_samples[ch][i]; + energy2 += sample*sample; + energy1 += fabs(sample); + } + } - energy2 = sqrt(energy2/(s->channels*s->block_align)); - energy1 = sqrt(2.0)*energy1/(s->channels*s->block_align); + energy2 = sqrt(energy2/(s->channels*s->block_align)); + energy1 = sqrt(2.0)*energy1/(s->channels*s->block_align); - // increase bitrate when samples are like a gaussian distribution - // reduce bitrate when samples are like a two-tailed exponential distribution + // increase bitrate when samples are like a gaussian distribution + // reduce bitrate when samples are like a two-tailed exponential distribution - if (energy2 > energy1) - energy2 += (energy2-energy1)*RATE_VARIATION; + if (energy2 > energy1) + energy2 += (energy2-energy1)*RATE_VARIATION; - quant = (int)(BASE_QUANT*s->quantization*energy2/SAMPLE_FACTOR); -// av_log(avctx, AV_LOG_DEBUG, "quant: %d energy: %f / %f\n", quant, energy1, energy2); + quant = (int)(BASE_QUANT*s->quantization*energy2/SAMPLE_FACTOR); +// av_log(avctx, AV_LOG_DEBUG, "quant: %d energy: %f / %f\n", quant, energy1, energy2); - if (quant < 1) - quant = 1; - if (quant > 65535) - quant = 65535; + if (quant < 1) + quant = 1; + if (quant > 65535) + quant = 65535; - set_ue_golomb(&pb, quant); + set_ue_golomb(&pb, quant); - quant *= SAMPLE_FACTOR; + quant *= SAMPLE_FACTOR; } // write out coded samples for (ch = 0; ch < s->channels; ch++) { - if (!s->lossless) - for (i = 0; i < s->block_align; i++) - s->coded_samples[ch][i] = divide(s->coded_samples[ch][i], quant); + if (!s->lossless) + for (i = 0; i < s->block_align; i++) + s->coded_samples[ch][i] = divide(s->coded_samples[ch][i], quant); - if (intlist_write(&pb, s->coded_samples[ch], s->block_align, 1) < 0) - return -1; + if (intlist_write(&pb, s->coded_samples[ch], s->block_align, 1) < 0) + return -1; } // av_log(avctx, AV_LOG_DEBUG, "used bytes: %d\n", (put_bits_count(&pb)+7)/8); @@ -757,8 +757,8 @@ static int sonic_decode_init(AVCodecContext *avctx) if (!avctx->extradata) { - av_log(avctx, AV_LOG_ERROR, "No mandatory headers present\n"); - return -1; + av_log(avctx, AV_LOG_ERROR, "No mandatory headers present\n"); + return -1; } init_get_bits(&gb, avctx->extradata, avctx->extradata_size); @@ -766,60 +766,60 @@ static int sonic_decode_init(AVCodecContext *avctx) version = get_bits(&gb, 2); if (version > 1) { - av_log(avctx, AV_LOG_ERROR, "Unsupported Sonic version, please report\n"); - return -1; + av_log(avctx, AV_LOG_ERROR, "Unsupported Sonic version, please report\n"); + return -1; } if (version == 1) { - s->channels = get_bits(&gb, 2); - s->samplerate = samplerate_table[get_bits(&gb, 4)]; - av_log(avctx, AV_LOG_INFO, "Sonicv2 chans: %d samprate: %d\n", - s->channels, s->samplerate); + s->channels = get_bits(&gb, 2); + s->samplerate = samplerate_table[get_bits(&gb, 4)]; + av_log(avctx, AV_LOG_INFO, "Sonicv2 chans: %d samprate: %d\n", + s->channels, s->samplerate); } if (s->channels > MAX_CHANNELS) { - av_log(avctx, AV_LOG_ERROR, "Only mono and stereo streams are supported by now\n"); - return -1; + av_log(avctx, AV_LOG_ERROR, "Only mono and stereo streams are supported by now\n"); + return -1; } s->lossless = get_bits1(&gb); if (!s->lossless) - skip_bits(&gb, 3); // XXX FIXME + skip_bits(&gb, 3); // XXX FIXME s->decorrelation = get_bits(&gb, 2); s->downsampling = get_bits(&gb, 2); s->num_taps = (get_bits(&gb, 5)+1)<<5; if (get_bits1(&gb)) // XXX FIXME - av_log(avctx, AV_LOG_INFO, "Custom quant table\n"); + av_log(avctx, AV_LOG_INFO, "Custom quant table\n"); s->block_align = (int)(2048.0*(s->samplerate/44100))/s->downsampling; s->frame_size = s->channels*s->block_align*s->downsampling; // avctx->frame_size = s->block_align; av_log(avctx, AV_LOG_INFO, "Sonic: ver: %d ls: %d dr: %d taps: %d block: %d frame: %d downsamp: %d\n", - version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling); + version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling); // generate taps s->tap_quant = av_mallocz(4* s->num_taps); for (i = 0; i < s->num_taps; i++) - s->tap_quant[i] = (int)(sqrt(i+1)); + s->tap_quant[i] = (int)(sqrt(i+1)); s->predictor_k = av_mallocz(4* s->num_taps); for (i = 0; i < s->channels; i++) { - s->predictor_state[i] = av_mallocz(4* s->num_taps); - if (!s->predictor_state[i]) - return -1; + s->predictor_state[i] = av_mallocz(4* s->num_taps); + if (!s->predictor_state[i]) + return -1; } for (i = 0; i < s->channels; i++) { - s->coded_samples[i] = av_mallocz(4* s->block_align); - if (!s->coded_samples[i]) - return -1; + s->coded_samples[i] = av_mallocz(4* s->block_align); + if (!s->coded_samples[i]) + return -1; } s->int_samples = av_mallocz(4* s->frame_size); @@ -837,16 +837,16 @@ static int sonic_decode_close(AVCodecContext *avctx) for (i = 0; i < s->channels; i++) { - av_free(s->predictor_state[i]); - av_free(s->coded_samples[i]); + av_free(s->predictor_state[i]); + av_free(s->coded_samples[i]); } return 0; } static int sonic_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) + void *data, int *data_size, + uint8_t *buf, int buf_size) { SonicContext *s = avctx->priv_data; GetBitContext gb; @@ -863,71 +863,71 @@ static int sonic_decode_frame(AVCodecContext *avctx, // dequantize for (i = 0; i < s->num_taps; i++) - s->predictor_k[i] *= s->tap_quant[i]; + s->predictor_k[i] *= s->tap_quant[i]; if (s->lossless) - quant = 1; + quant = 1; else - quant = get_ue_golomb(&gb) * SAMPLE_FACTOR; + quant = get_ue_golomb(&gb) * SAMPLE_FACTOR; // av_log(NULL, AV_LOG_INFO, "quant: %d\n", quant); for (ch = 0; ch < s->channels; ch++) { - int x = ch; + int x = ch; - predictor_init_state(s->predictor_k, s->predictor_state[ch], s->num_taps); + predictor_init_state(s->predictor_k, s->predictor_state[ch], s->num_taps); - intlist_read(&gb, s->coded_samples[ch], s->block_align, 1); + intlist_read(&gb, s->coded_samples[ch], s->block_align, 1); - for (i = 0; i < s->block_align; i++) - { - for (j = 0; j < s->downsampling - 1; j++) - { - s->int_samples[x] = predictor_calc_error(s->predictor_k, s->predictor_state[ch], s->num_taps, 0); - x += s->channels; - } + for (i = 0; i < s->block_align; i++) + { + for (j = 0; j < s->downsampling - 1; j++) + { + s->int_samples[x] = predictor_calc_error(s->predictor_k, s->predictor_state[ch], s->num_taps, 0); + x += s->channels; + } - s->int_samples[x] = predictor_calc_error(s->predictor_k, s->predictor_state[ch], s->num_taps, s->coded_samples[ch][i] * quant); - x += s->channels; - } + s->int_samples[x] = predictor_calc_error(s->predictor_k, s->predictor_state[ch], s->num_taps, s->coded_samples[ch][i] * quant); + x += s->channels; + } - for (i = 0; i < s->num_taps; i++) - s->predictor_state[ch][i] = s->int_samples[s->frame_size - s->channels + ch - i*s->channels]; + for (i = 0; i < s->num_taps; i++) + s->predictor_state[ch][i] = s->int_samples[s->frame_size - s->channels + ch - i*s->channels]; } switch(s->decorrelation) { - case MID_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - { - s->int_samples[i+1] += shift(s->int_samples[i], 1); - s->int_samples[i] -= s->int_samples[i+1]; - } - break; - case LEFT_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - s->int_samples[i+1] += s->int_samples[i]; - break; - case RIGHT_SIDE: - for (i = 0; i < s->frame_size; i += s->channels) - s->int_samples[i] += s->int_samples[i+1]; - break; + case MID_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + { + s->int_samples[i+1] += shift(s->int_samples[i], 1); + s->int_samples[i] -= s->int_samples[i+1]; + } + break; + case LEFT_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + s->int_samples[i+1] += s->int_samples[i]; + break; + case RIGHT_SIDE: + for (i = 0; i < s->frame_size; i += s->channels) + s->int_samples[i] += s->int_samples[i+1]; + break; } if (!s->lossless) - for (i = 0; i < s->frame_size; i++) - s->int_samples[i] = shift(s->int_samples[i], SAMPLE_SHIFT); + for (i = 0; i < s->frame_size; i++) + s->int_samples[i] = shift(s->int_samples[i], SAMPLE_SHIFT); // internal -> short for (i = 0; i < s->frame_size; i++) { - if (s->int_samples[i] > 32767) - samples[i] = 32767; - else if (s->int_samples[i] < -32768) - samples[i] = -32768; - else - samples[i] = s->int_samples[i]; + if (s->int_samples[i] > 32767) + samples[i] = 32767; + else if (s->int_samples[i] < -32768) + samples[i] = -32768; + else + samples[i] = s->int_samples[i]; } align_get_bits(&gb); |