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@ -98,8 +98,9 @@ typedef struct FlacEncodeContext { |
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struct AVMD5 *md5ctx; |
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} FlacEncodeContext; |
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/**
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* Write streaminfo metadata block to byte array |
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* Write streaminfo metadata block to byte array. |
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*/ |
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static void write_streaminfo(FlacEncodeContext *s, uint8_t *header) |
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{ |
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@ -123,9 +124,10 @@ static void write_streaminfo(FlacEncodeContext *s, uint8_t *header) |
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memcpy(&header[18], s->md5sum, 16); |
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} |
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/**
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* Set blocksize based on samplerate |
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* Choose the closest predefined blocksize >= BLOCK_TIME_MS milliseconds |
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* Set blocksize based on samplerate. |
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* Choose the closest predefined blocksize >= BLOCK_TIME_MS milliseconds. |
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*/ |
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static int select_blocksize(int samplerate, int block_time_ms) |
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{ |
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@ -137,13 +139,15 @@ static int select_blocksize(int samplerate, int block_time_ms) |
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blocksize = ff_flac_blocksize_table[1]; |
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target = (samplerate * block_time_ms) / 1000; |
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for (i = 0; i < 16; i++) { |
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if(target >= ff_flac_blocksize_table[i] && ff_flac_blocksize_table[i] > blocksize) { |
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if (target >= ff_flac_blocksize_table[i] && |
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ff_flac_blocksize_table[i] > blocksize) { |
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blocksize = ff_flac_blocksize_table[i]; |
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} |
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} |
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return blocksize; |
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} |
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static av_cold int flac_encode_init(AVCodecContext *avctx) |
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{ |
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int freq = avctx->sample_rate; |
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@ -156,13 +160,11 @@ static av_cold int flac_encode_init(AVCodecContext *avctx) |
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dsputil_init(&s->dsp, avctx); |
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if(avctx->sample_fmt != SAMPLE_FMT_S16) { |
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if (avctx->sample_fmt != SAMPLE_FMT_S16) |
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return -1; |
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} |
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if(channels < 1 || channels > FLAC_MAX_CHANNELS) { |
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if (channels < 1 || channels > FLAC_MAX_CHANNELS) |
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return -1; |
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} |
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s->channels = channels; |
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/* find samplerate in table */ |
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@ -194,11 +196,10 @@ static av_cold int flac_encode_init(AVCodecContext *avctx) |
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} |
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/* set compression option defaults based on avctx->compression_level */ |
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if(avctx->compression_level < 0) { |
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if (avctx->compression_level < 0) |
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s->options.compression_level = 5; |
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} else { |
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else |
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s->options.compression_level = avctx->compression_level; |
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} |
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av_log(avctx, AV_LOG_DEBUG, " compression: %d\n", s->options.compression_level); |
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level = s->options.compression_level; |
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@ -209,18 +210,22 @@ static av_cold int flac_encode_init(AVCodecContext *avctx) |
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} |
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s->options.block_time_ms = ((int[]){ 27, 27, 27,105,105,105,105,105,105,105,105,105,105})[level]; |
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s->options.lpc_type = ((int[]){ AV_LPC_TYPE_FIXED, AV_LPC_TYPE_FIXED, AV_LPC_TYPE_FIXED, |
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AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, |
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AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, |
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AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, |
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AV_LPC_TYPE_LEVINSON})[level]; |
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s->options.min_prediction_order = ((int[]){ 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1})[level]; |
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s->options.max_prediction_order = ((int[]){ 3, 4, 4, 6, 8, 8, 8, 8, 12, 12, 12, 32, 32})[level]; |
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s->options.prediction_order_method = ((int[]){ ORDER_METHOD_EST, ORDER_METHOD_EST, ORDER_METHOD_EST, |
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ORDER_METHOD_EST, ORDER_METHOD_EST, ORDER_METHOD_EST, |
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ORDER_METHOD_4LEVEL, ORDER_METHOD_LOG, ORDER_METHOD_4LEVEL, |
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ORDER_METHOD_LOG, ORDER_METHOD_SEARCH, ORDER_METHOD_LOG, |
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ORDER_METHOD_SEARCH})[level]; |
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s->options.min_partition_order = ((int[]){ 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})[level]; |
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s->options.max_partition_order = ((int[]){ 2, 2, 3, 3, 3, 8, 8, 8, 8, 8, 8, 8, 8})[level]; |
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@ -412,6 +417,7 @@ static av_cold int flac_encode_init(AVCodecContext *avctx) |
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return 0; |
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} |
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static void init_frame(FlacEncodeContext *s) |
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{ |
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int i, ch; |
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@ -438,13 +444,13 @@ static void init_frame(FlacEncodeContext *s) |
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} |
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} |
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for(ch=0; ch<s->channels; ch++) { |
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for (ch = 0; ch < s->channels; ch++) |
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frame->subframes[ch].obits = 16; |
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} |
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} |
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/**
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* Copy channel-interleaved input samples into separate subframes |
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* Copy channel-interleaved input samples into separate subframes. |
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*/ |
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static void copy_samples(FlacEncodeContext *s, const int16_t *samples) |
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{ |
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@ -452,18 +458,16 @@ static void copy_samples(FlacEncodeContext *s, const int16_t *samples) |
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FlacFrame *frame; |
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frame = &s->frame; |
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for(i=0,j=0; i<frame->blocksize; i++) { |
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for(ch=0; ch<s->channels; ch++,j++) { |
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for (i = 0, j = 0; i < frame->blocksize; i++) |
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for (ch = 0; ch < s->channels; ch++, j++) |
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frame->subframes[ch].samples[i] = samples[j]; |
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} |
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} |
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} |
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#define rice_encode_count(sum, n, k) (((n)*((k)+1))+((sum-(n>>1))>>(k))) |
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/**
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* Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0 |
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* Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0. |
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*/ |
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static int find_optimal_param(uint32_t sum, int n) |
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{ |
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@ -477,6 +481,7 @@ static int find_optimal_param(uint32_t sum, int n) |
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return FFMIN(k, MAX_RICE_PARAM); |
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} |
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static uint32_t calc_optimal_rice_params(RiceContext *rc, int porder, |
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uint32_t *sums, int n, int pred_order) |
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{ |
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@ -500,6 +505,7 @@ static uint32_t calc_optimal_rice_params(RiceContext *rc, int porder, |
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return all_bits; |
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} |
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static void calc_sums(int pmin, int pmax, uint32_t *data, int n, int pred_order, |
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uint32_t sums[][MAX_PARTITIONS]) |
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{ |
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@ -513,20 +519,19 @@ static void calc_sums(int pmin, int pmax, uint32_t *data, int n, int pred_order, |
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res_end = &data[n >> pmax]; |
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for (i = 0; i < parts; i++) { |
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uint32_t sum = 0; |
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while(res < res_end){ |
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while (res < res_end) |
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sum += *(res++); |
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} |
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sums[pmax][i] = sum; |
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res_end += n >> pmax; |
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} |
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/* sums for lower levels */ |
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for (i = pmax - 1; i >= pmin; i--) { |
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parts = (1 << i); |
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for(j=0; j<parts; j++) { |
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for (j = 0; j < parts; j++) |
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sums[i][j] = sums[i+1][2*j] + sums[i+1][2*j+1]; |
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} |
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} |
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} |
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static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax, |
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int32_t *data, int n, int pred_order) |
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@ -543,9 +548,8 @@ static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax, |
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assert(pmin <= pmax); |
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udata = av_malloc(n * sizeof(uint32_t)); |
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for(i=0; i<n; i++) { |
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for (i = 0; i < n; i++) |
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udata[i] = (2*data[i]) ^ (data[i]>>31); |
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} |
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calc_sums(pmin, pmax, udata, n, pred_order, sums); |
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@ -563,6 +567,7 @@ static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax, |
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return bits[opt_porder]; |
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} |
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static int get_max_p_order(int max_porder, int n, int order) |
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{ |
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int porder = FFMIN(max_porder, av_log2(n^(n-1))); |
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@ -571,6 +576,7 @@ static int get_max_p_order(int max_porder, int n, int order) |
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return porder; |
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} |
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static uint32_t calc_rice_params_fixed(RiceContext *rc, int pmin, int pmax, |
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int32_t *data, int n, int pred_order, |
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int bps) |
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@ -583,6 +589,7 @@ static uint32_t calc_rice_params_fixed(RiceContext *rc, int pmin, int pmax, |
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return bits; |
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} |
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static uint32_t calc_rice_params_lpc(RiceContext *rc, int pmin, int pmax, |
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int32_t *data, int n, int pred_order, |
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int bps, int precision) |
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@ -595,20 +602,21 @@ static uint32_t calc_rice_params_lpc(RiceContext *rc, int pmin, int pmax, |
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return bits; |
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} |
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static void encode_residual_verbatim(int32_t *res, int32_t *smp, int n) |
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{ |
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assert(n > 0); |
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memcpy(res, smp, n * sizeof(int32_t)); |
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} |
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static void encode_residual_fixed(int32_t *res, const int32_t *smp, int n, |
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int order) |
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{ |
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int i; |
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for(i=0; i<order; i++) { |
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for (i = 0; i < order; i++) |
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res[i] = smp[i]; |
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} |
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if (order == 0) { |
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for (i = order; i < n; i++) |
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@ -652,6 +660,7 @@ static void encode_residual_fixed(int32_t *res, const int32_t *smp, int n, |
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} |
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} |
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#define LPC1(x) {\ |
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int c = coefs[(x)-1];\
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p0 += c * s;\
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@ -659,9 +668,9 @@ static void encode_residual_fixed(int32_t *res, const int32_t *smp, int n, |
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p1 += c * s;\
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} |
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static av_always_inline void encode_residual_lpc_unrolled( |
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int32_t *res, const int32_t *smp, int n, |
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int order, const int32_t *coefs, int shift, int big) |
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static av_always_inline void encode_residual_lpc_unrolled(int32_t *res, |
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const int32_t *smp, int n, int order, |
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const int32_t *coefs, int shift, int big) |
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{ |
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int i; |
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for (i = order; i < n; i += 2) { |
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@ -719,13 +728,13 @@ static av_always_inline void encode_residual_lpc_unrolled( |
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} |
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} |
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static void encode_residual_lpc(int32_t *res, const int32_t *smp, int n, |
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int order, const int32_t *coefs, int shift) |
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{ |
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int i; |
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for(i=0; i<order; i++) { |
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for (i = 0; i < order; i++) |
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res[i] = smp[i]; |
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} |
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#if CONFIG_SMALL |
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for (i = order; i < n; i += 2) { |
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int j; |
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@ -755,6 +764,7 @@ static void encode_residual_lpc(int32_t *res, const int32_t *smp, int n, |
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#endif |
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} |
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static int encode_residual(FlacEncodeContext *ctx, int ch) |
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{ |
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int i, n; |
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@ -773,9 +783,9 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
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n = frame->blocksize; |
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/* CONSTANT */ |
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for(i=1; i<n; i++) { |
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if(smp[i] != smp[0]) break; |
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} |
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for (i = 1; i < n; i++) |
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if(smp[i] != smp[0]) |
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break; |
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if (i == n) { |
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sub->type = sub->type_code = FLAC_SUBFRAME_CONSTANT; |
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res[0] = smp[0]; |
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@ -800,17 +810,17 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
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if (ctx->options.lpc_type == AV_LPC_TYPE_NONE || |
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ctx->options.lpc_type == AV_LPC_TYPE_FIXED || n <= max_order) { |
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uint32_t bits[MAX_FIXED_ORDER+1]; |
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if(max_order > MAX_FIXED_ORDER) max_order = MAX_FIXED_ORDER; |
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if (max_order > MAX_FIXED_ORDER) |
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max_order = MAX_FIXED_ORDER; |
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opt_order = 0; |
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bits[0] = UINT32_MAX; |
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for (i = min_order; i <= max_order; i++) { |
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encode_residual_fixed(res, smp, n, i); |
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bits[i] = calc_rice_params_fixed(&sub->rc, min_porder, max_porder, res, |
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n, i, sub->obits); |
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if(bits[i] < bits[opt_order]) { |
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if (bits[i] < bits[opt_order]) |
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opt_order = i; |
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} |
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} |
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sub->order = opt_order; |
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sub->type = FLAC_SUBFRAME_FIXED; |
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sub->type_code = sub->type | sub->order; |
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|
|
@ -839,7 +849,8 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
bits[opt_index] = UINT32_MAX; |
|
|
|
|
for (i = levels-1; i >= 0; i--) { |
|
|
|
|
order = min_order + (((max_order-min_order+1) * (i+1)) / levels)-1; |
|
|
|
|
if(order < 0) order = 0; |
|
|
|
|
if (order < 0) |
|
|
|
|
order = 0; |
|
|
|
|
encode_residual_lpc(res, smp, n, order+1, coefs[order], shift[order]); |
|
|
|
|
bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder, |
|
|
|
|
res, n, order+1, sub->obits, precision); |
|
|
|
@ -858,10 +869,9 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]); |
|
|
|
|
bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder, |
|
|
|
|
res, n, i+1, sub->obits, precision); |
|
|
|
|
if(bits[i] < bits[opt_order]) { |
|
|
|
|
if (bits[i] < bits[opt_order]) |
|
|
|
|
opt_order = i; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
opt_order++; |
|
|
|
|
} else if (omethod == ORDER_METHOD_LOG) { |
|
|
|
|
uint32_t bits[MAX_LPC_ORDER]; |
|
|
|
@ -877,7 +887,8 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
continue; |
|
|
|
|
encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]); |
|
|
|
|
bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder, |
|
|
|
|
res, n, i+1, sub->obits, precision); |
|
|
|
|
res, n, i+1, sub->obits, |
|
|
|
|
precision); |
|
|
|
|
if (bits[i] < bits[opt_order]) |
|
|
|
|
opt_order = i; |
|
|
|
|
} |
|
|
|
@ -889,14 +900,16 @@ static int encode_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
sub->type = FLAC_SUBFRAME_LPC; |
|
|
|
|
sub->type_code = sub->type | (sub->order-1); |
|
|
|
|
sub->shift = shift[sub->order-1]; |
|
|
|
|
for(i=0; i<sub->order; i++) { |
|
|
|
|
for (i = 0; i < sub->order; i++) |
|
|
|
|
sub->coefs[i] = coefs[sub->order-1][i]; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
encode_residual_lpc(res, smp, n, sub->order, sub->coefs, sub->shift); |
|
|
|
|
return calc_rice_params_lpc(&sub->rc, min_porder, max_porder, res, n, sub->order, |
|
|
|
|
sub->obits, precision); |
|
|
|
|
|
|
|
|
|
return calc_rice_params_lpc(&sub->rc, min_porder, max_porder, res, n, |
|
|
|
|
sub->order, sub->obits, precision); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int encode_residual_v(FlacEncodeContext *ctx, int ch) |
|
|
|
|
{ |
|
|
|
|
int i, n; |
|
|
|
@ -911,9 +924,9 @@ static int encode_residual_v(FlacEncodeContext *ctx, int ch) |
|
|
|
|
n = frame->blocksize; |
|
|
|
|
|
|
|
|
|
/* CONSTANT */ |
|
|
|
|
for(i=1; i<n; i++) { |
|
|
|
|
if(smp[i] != smp[0]) break; |
|
|
|
|
} |
|
|
|
|
for (i = 1; i < n; i++) |
|
|
|
|
if (smp[i] != smp[0]) |
|
|
|
|
break; |
|
|
|
|
if (i == n) { |
|
|
|
|
sub->type = sub->type_code = FLAC_SUBFRAME_CONSTANT; |
|
|
|
|
res[0] = smp[0]; |
|
|
|
@ -926,6 +939,7 @@ static int encode_residual_v(FlacEncodeContext *ctx, int ch) |
|
|
|
|
return sub->obits * n; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n) |
|
|
|
|
{ |
|
|
|
|
int i, best; |
|
|
|
@ -958,11 +972,9 @@ static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n) |
|
|
|
|
|
|
|
|
|
/* return mode with lowest score */ |
|
|
|
|
best = 0; |
|
|
|
|
for(i=1; i<4; i++) { |
|
|
|
|
if(score[i] < score[best]) { |
|
|
|
|
for (i = 1; i < 4; i++) |
|
|
|
|
if (score[i] < score[best]) |
|
|
|
|
best = i; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
if (best == 0) { |
|
|
|
|
return FLAC_CHMODE_INDEPENDENT; |
|
|
|
|
} else if (best == 1) { |
|
|
|
@ -974,8 +986,9 @@ static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Perform stereo channel decorrelation |
|
|
|
|
* Perform stereo channel decorrelation. |
|
|
|
|
*/ |
|
|
|
|
static void channel_decorrelation(FlacEncodeContext *ctx) |
|
|
|
|
{ |
|
|
|
@ -996,9 +1009,8 @@ static void channel_decorrelation(FlacEncodeContext *ctx) |
|
|
|
|
frame->ch_mode = estimate_stereo_mode(left, right, n); |
|
|
|
|
|
|
|
|
|
/* perform decorrelation and adjust bits-per-sample */ |
|
|
|
|
if(frame->ch_mode == FLAC_CHMODE_INDEPENDENT) { |
|
|
|
|
if (frame->ch_mode == FLAC_CHMODE_INDEPENDENT) |
|
|
|
|
return; |
|
|
|
|
} |
|
|
|
|
if (frame->ch_mode == FLAC_CHMODE_MID_SIDE) { |
|
|
|
|
int32_t tmp; |
|
|
|
|
for (i = 0; i < n; i++) { |
|
|
|
@ -1008,24 +1020,24 @@ static void channel_decorrelation(FlacEncodeContext *ctx) |
|
|
|
|
} |
|
|
|
|
frame->subframes[1].obits++; |
|
|
|
|
} else if (frame->ch_mode == FLAC_CHMODE_LEFT_SIDE) { |
|
|
|
|
for(i=0; i<n; i++) { |
|
|
|
|
for (i = 0; i < n; i++) |
|
|
|
|
right[i] = left[i] - right[i]; |
|
|
|
|
} |
|
|
|
|
frame->subframes[1].obits++; |
|
|
|
|
} else { |
|
|
|
|
for(i=0; i<n; i++) { |
|
|
|
|
for (i = 0; i < n; i++) |
|
|
|
|
left[i] -= right[i]; |
|
|
|
|
} |
|
|
|
|
frame->subframes[0].obits++; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void write_utf8(PutBitContext *pb, uint32_t val) |
|
|
|
|
{ |
|
|
|
|
uint8_t tmp; |
|
|
|
|
PUT_UTF8(val, tmp, put_bits(pb, 8, tmp);) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_frame_header(FlacEncodeContext *s) |
|
|
|
|
{ |
|
|
|
|
FlacFrame *frame; |
|
|
|
@ -1036,30 +1048,33 @@ static void output_frame_header(FlacEncodeContext *s) |
|
|
|
|
put_bits(&s->pb, 16, 0xFFF8); |
|
|
|
|
put_bits(&s->pb, 4, frame->bs_code[0]); |
|
|
|
|
put_bits(&s->pb, 4, s->sr_code[0]); |
|
|
|
|
if(frame->ch_mode == FLAC_CHMODE_INDEPENDENT) { |
|
|
|
|
|
|
|
|
|
if (frame->ch_mode == FLAC_CHMODE_INDEPENDENT) |
|
|
|
|
put_bits(&s->pb, 4, s->channels-1); |
|
|
|
|
} else { |
|
|
|
|
else |
|
|
|
|
put_bits(&s->pb, 4, frame->ch_mode); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
put_bits(&s->pb, 3, 4); /* bits-per-sample code */ |
|
|
|
|
put_bits(&s->pb, 1, 0); |
|
|
|
|
write_utf8(&s->pb, s->frame_count); |
|
|
|
|
if(frame->bs_code[0] == 6) { |
|
|
|
|
|
|
|
|
|
if (frame->bs_code[0] == 6) |
|
|
|
|
put_bits(&s->pb, 8, frame->bs_code[1]); |
|
|
|
|
} else if(frame->bs_code[0] == 7) { |
|
|
|
|
else if (frame->bs_code[0] == 7) |
|
|
|
|
put_bits(&s->pb, 16, frame->bs_code[1]); |
|
|
|
|
} |
|
|
|
|
if(s->sr_code[0] == 12) { |
|
|
|
|
|
|
|
|
|
if (s->sr_code[0] == 12) |
|
|
|
|
put_bits(&s->pb, 8, s->sr_code[1]); |
|
|
|
|
} else if(s->sr_code[0] > 12) { |
|
|
|
|
else if (s->sr_code[0] > 12) |
|
|
|
|
put_bits(&s->pb, 16, s->sr_code[1]); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
flush_put_bits(&s->pb); |
|
|
|
|
crc = av_crc(av_crc_get_table(AV_CRC_8_ATM), 0, |
|
|
|
|
s->pb.buf, put_bits_count(&s->pb)>>3); |
|
|
|
|
crc = av_crc(av_crc_get_table(AV_CRC_8_ATM), 0, s->pb.buf, |
|
|
|
|
put_bits_count(&s->pb) >> 3); |
|
|
|
|
put_bits(&s->pb, 8, crc); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_subframe_constant(FlacEncodeContext *s, int ch) |
|
|
|
|
{ |
|
|
|
|
FlacSubframe *sub; |
|
|
|
@ -1070,6 +1085,7 @@ static void output_subframe_constant(FlacEncodeContext *s, int ch) |
|
|
|
|
put_sbits(&s->pb, sub->obits, res); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_subframe_verbatim(FlacEncodeContext *s, int ch) |
|
|
|
|
{ |
|
|
|
|
int i; |
|
|
|
@ -1086,6 +1102,7 @@ static void output_subframe_verbatim(FlacEncodeContext *s, int ch) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
{ |
|
|
|
|
int i, j, p, n, parts; |
|
|
|
@ -1114,12 +1131,13 @@ static void output_residual(FlacEncodeContext *ctx, int ch) |
|
|
|
|
for (p = 0; p < parts; p++) { |
|
|
|
|
k = sub->rc.params[p]; |
|
|
|
|
put_bits(&ctx->pb, 4, k); |
|
|
|
|
if(p == 1) res_cnt = psize; |
|
|
|
|
for(i=0; i<res_cnt && j<n; i++, j++) { |
|
|
|
|
if (p == 1) |
|
|
|
|
res_cnt = psize; |
|
|
|
|
for (i = 0; i < res_cnt && j < n; i++, j++) |
|
|
|
|
set_sr_golomb_flac(&ctx->pb, res[j], k, INT32_MAX, 0); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_subframe_fixed(FlacEncodeContext *ctx, int ch) |
|
|
|
|
{ |
|
|
|
@ -1131,14 +1149,14 @@ static void output_subframe_fixed(FlacEncodeContext *ctx, int ch) |
|
|
|
|
sub = &frame->subframes[ch]; |
|
|
|
|
|
|
|
|
|
/* warm-up samples */ |
|
|
|
|
for(i=0; i<sub->order; i++) { |
|
|
|
|
for (i = 0; i < sub->order; i++) |
|
|
|
|
put_sbits(&ctx->pb, sub->obits, sub->residual[i]); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* residual */ |
|
|
|
|
output_residual(ctx, ch); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_subframe_lpc(FlacEncodeContext *ctx, int ch) |
|
|
|
|
{ |
|
|
|
|
int i, cbits; |
|
|
|
@ -1149,22 +1167,21 @@ static void output_subframe_lpc(FlacEncodeContext *ctx, int ch) |
|
|
|
|
sub = &frame->subframes[ch]; |
|
|
|
|
|
|
|
|
|
/* warm-up samples */ |
|
|
|
|
for(i=0; i<sub->order; i++) { |
|
|
|
|
for (i = 0; i < sub->order; i++) |
|
|
|
|
put_sbits(&ctx->pb, sub->obits, sub->residual[i]); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* LPC coefficients */ |
|
|
|
|
cbits = ctx->options.lpc_coeff_precision; |
|
|
|
|
put_bits( &ctx->pb, 4, cbits-1); |
|
|
|
|
put_sbits(&ctx->pb, 5, sub->shift); |
|
|
|
|
for(i=0; i<sub->order; i++) { |
|
|
|
|
for (i = 0; i < sub->order; i++) |
|
|
|
|
put_sbits(&ctx->pb, cbits, sub->coefs[i]); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* residual */ |
|
|
|
|
output_residual(ctx, ch); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_subframes(FlacEncodeContext *s) |
|
|
|
|
{ |
|
|
|
|
FlacFrame *frame; |
|
|
|
@ -1182,28 +1199,29 @@ static void output_subframes(FlacEncodeContext *s) |
|
|
|
|
put_bits(&s->pb, 1, 0); /* no wasted bits */ |
|
|
|
|
|
|
|
|
|
/* subframe */ |
|
|
|
|
if(sub->type == FLAC_SUBFRAME_CONSTANT) { |
|
|
|
|
if(sub->type == FLAC_SUBFRAME_CONSTANT) |
|
|
|
|
output_subframe_constant(s, ch); |
|
|
|
|
} else if(sub->type == FLAC_SUBFRAME_VERBATIM) { |
|
|
|
|
else if(sub->type == FLAC_SUBFRAME_VERBATIM) |
|
|
|
|
output_subframe_verbatim(s, ch); |
|
|
|
|
} else if(sub->type == FLAC_SUBFRAME_FIXED) { |
|
|
|
|
else if(sub->type == FLAC_SUBFRAME_FIXED) |
|
|
|
|
output_subframe_fixed(s, ch); |
|
|
|
|
} else if(sub->type == FLAC_SUBFRAME_LPC) { |
|
|
|
|
else if(sub->type == FLAC_SUBFRAME_LPC) |
|
|
|
|
output_subframe_lpc(s, ch); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void output_frame_footer(FlacEncodeContext *s) |
|
|
|
|
{ |
|
|
|
|
int crc; |
|
|
|
|
flush_put_bits(&s->pb); |
|
|
|
|
crc = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, |
|
|
|
|
s->pb.buf, put_bits_count(&s->pb)>>3)); |
|
|
|
|
crc = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, s->pb.buf, |
|
|
|
|
put_bits_count(&s->pb)>>3)); |
|
|
|
|
put_bits(&s->pb, 16, crc); |
|
|
|
|
flush_put_bits(&s->pb); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void update_md5_sum(FlacEncodeContext *s, const int16_t *samples) |
|
|
|
|
{ |
|
|
|
|
#if HAVE_BIGENDIAN |
|
|
|
@ -1217,6 +1235,7 @@ static void update_md5_sum(FlacEncodeContext *s, const int16_t *samples) |
|
|
|
|
#endif |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int flac_encode_frame(AVCodecContext *avctx, uint8_t *frame, |
|
|
|
|
int buf_size, void *data) |
|
|
|
|
{ |
|
|
|
@ -1247,9 +1266,8 @@ static int flac_encode_frame(AVCodecContext *avctx, uint8_t *frame, |
|
|
|
|
|
|
|
|
|
channel_decorrelation(s); |
|
|
|
|
|
|
|
|
|
for(ch=0; ch<s->channels; ch++) { |
|
|
|
|
for (ch = 0; ch < s->channels; ch++) |
|
|
|
|
encode_residual(s, ch); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
write_frame: |
|
|
|
|
init_put_bits(&s->pb, frame, buf_size); |
|
|
|
@ -1266,9 +1284,8 @@ write_frame: |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* frame too large. use verbatim mode */ |
|
|
|
|
for(ch=0; ch<s->channels; ch++) { |
|
|
|
|
for (ch = 0; ch < s->channels; ch++) |
|
|
|
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encode_residual_v(s, ch); |
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} |
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reencoded = 1; |
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goto write_frame; |
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} |
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@ -1284,6 +1301,7 @@ write_frame: |
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return out_bytes; |
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} |
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static av_cold int flac_encode_close(AVCodecContext *avctx) |
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{ |
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if (avctx->priv_data) { |
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@ -1296,6 +1314,7 @@ static av_cold int flac_encode_close(AVCodecContext *avctx) |
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return 0; |
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} |
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AVCodec flac_encoder = { |
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|
"flac", |
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AVMEDIA_TYPE_AUDIO, |
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|