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g723.1: various cosmetics and changes that should have no user vissible effect.
code from qatar (55c3a4f617)
Author of the code was probably Mohamed or Kostya
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
parent
d486a6eae9
commit
1eb1392690
@ -83,7 +83,9 @@ static av_cold int g723_1_decode_init(AVCodecContext *avctx)
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{
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G723_1_Context *p = avctx->priv_data;
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avctx->channel_layout = AV_CH_LAYOUT_MONO;
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avctx->sample_fmt = AV_SAMPLE_FMT_S16;
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avctx->channels = 1;
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p->pf_gain = 1 << 12;
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avcodec_get_frame_defaults(&p->frame);
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@ -225,26 +227,25 @@ static int16_t square_root(int val)
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* Calculate the number of left-shifts required for normalizing the input.
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*
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* @param num input number
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* @param width width of the input, 16 bits(0) / 32 bits(1)
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* @param width width of the input, 15 or 31 bits
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*/
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static int normalize_bits(int num, int width)
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{
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int i = 0;
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int bits = (width) ? 31 : 15;
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if (num) {
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if (num == -1)
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return bits;
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return width;
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if (num < 0)
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num = ~num;
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i= bits - av_log2(num) - 1;
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i= width - av_log2(num) - 1;
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i= FFMAX(i, 0);
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}
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return i;
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}
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#define normalize_bits_int16(num) normalize_bits(num, 0)
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#define normalize_bits_int32(num) normalize_bits(num, 1)
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#define normalize_bits_int16(num) normalize_bits(num, 15)
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#define normalize_bits_int32(num) normalize_bits(num, 31)
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#define dot_product(a,b,c,d) (ff_dot_product(a,b,c)<<(d))
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/**
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@ -263,7 +264,7 @@ static int scale_vector(int16_t *vector, int length)
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for (i = 0; i < length; i++)
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max = FFMAX(max, FFABS(vector[i]));
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bits = normalize_bits(max, 0);
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bits = normalize_bits(max, 15);
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scale = shift_table[bits];
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for (i = 0; i < length; i++)
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@ -548,7 +549,7 @@ static void get_residual(int16_t *residual, int16_t *prev_excitation, int lag)
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*/
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static void gen_acb_excitation(int16_t *vector, int16_t *prev_excitation,
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int pitch_lag, G723_1_Subframe subfrm,
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Rate cur_rate)
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enum Rate cur_rate)
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{
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int16_t residual[SUBFRAME_LEN + PITCH_ORDER - 1];
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const int16_t *cb_ptr;
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@ -710,7 +711,7 @@ static void comp_ppf_coeff(G723_1_Context *p, int offset, int pitch_lag,
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for (i = 0; i < 5; i++)
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temp1 = FFMAX(energy[i], temp1);
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scale = normalize_bits(temp1, 1);
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scale = normalize_bits(temp1, 31);
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for (i = 0; i < 5; i++)
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energy[i] = av_clipl_int32(energy[i] << scale) >> 16;
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@ -861,8 +862,8 @@ static void gain_scale(G723_1_Context *p, int16_t * buf, int energy)
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}
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if (num && denom) {
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bits1 = normalize_bits(num, 1);
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bits2 = normalize_bits(denom, 1);
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bits1 = normalize_bits(num, 31);
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bits2 = normalize_bits(denom, 31);
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num = num << bits1 >> 1;
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denom <<= bits2;
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@ -921,7 +922,7 @@ static void formant_postfilter(G723_1_Context *p, int16_t *lpc, int16_t *buf)
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int scale, energy;
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/* Normalize */
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memcpy(temp_vector, buf_ptr, SUBFRAME_LEN * sizeof(int16_t));
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memcpy(temp_vector, buf_ptr, SUBFRAME_LEN * sizeof(*temp_vector));
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scale = scale_vector(temp_vector, SUBFRAME_LEN);
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/* Compute auto correlation coefficients */
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@ -983,8 +984,10 @@ static int g723_1_decode_frame(AVCodecContext *avctx, void *data,
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if (unpack_bitstream(p, buf, buf_size) < 0) {
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bad_frame = 1;
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p->cur_frame_type = p->past_frame_type == ACTIVE_FRAME ?
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ACTIVE_FRAME : UNTRANSMITTED_FRAME;
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if (p->past_frame_type == ACTIVE_FRAME)
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p->cur_frame_type = ACTIVE_FRAME;
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else
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p->cur_frame_type = UNTRANSMITTED_FRAME;
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}
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p->frame.nb_samples = FRAME_LEN + LPC_ORDER;
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@ -995,10 +998,10 @@ static int g723_1_decode_frame(AVCodecContext *avctx, void *data,
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out= (int16_t*)p->frame.data[0];
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if(p->cur_frame_type == ACTIVE_FRAME) {
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if (p->cur_frame_type == ACTIVE_FRAME) {
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if (!bad_frame)
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p->erased_frames = 0;
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else if(p->erased_frames != 3)
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else if (p->erased_frames != 3)
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p->erased_frames++;
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inverse_quant(cur_lsp, p->prev_lsp, p->lsp_index, bad_frame);
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@ -1038,27 +1041,30 @@ static int g723_1_decode_frame(AVCodecContext *avctx, void *data,
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p->interp_index = comp_interp_index(p, p->pitch_lag[1],
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&p->sid_gain, &p->cur_gain);
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for (i = PITCH_MAX, j = 0; j < SUBFRAMES; i += SUBFRAME_LEN, j++)
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i = PITCH_MAX;
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for (j = 0; j < SUBFRAMES; i += SUBFRAME_LEN, j++)
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comp_ppf_coeff(p, i, p->pitch_lag[j >> 1],
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ppf + j, p->cur_rate);
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/* Restore the original excitation */
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memcpy(p->excitation, p->prev_excitation,
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PITCH_MAX * sizeof(int16_t));
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memcpy(vector_ptr, out, FRAME_LEN * sizeof(int16_t));
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PITCH_MAX * sizeof(*p->excitation));
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memcpy(vector_ptr, out, FRAME_LEN * sizeof(*vector_ptr));
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/* Peform pitch postfiltering */
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for (i = 0, j = 0; j < SUBFRAMES; i += SUBFRAME_LEN, j++)
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ff_acelp_weighted_vector_sum(out + LPC_ORDER + i, vector_ptr + i,
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ff_acelp_weighted_vector_sum(out + LPC_ORDER + i,
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vector_ptr + i,
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vector_ptr + i + ppf[j].index,
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ppf[j].sc_gain, ppf[j].opt_gain,
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ppf[j].sc_gain,
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ppf[j].opt_gain,
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1 << 14, 15, SUBFRAME_LEN);
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} else {
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p->interp_gain = (p->interp_gain * 3 + 2) >> 2;
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if (p->erased_frames == 3) {
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/* Mute output */
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memset(p->excitation, 0,
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(FRAME_LEN + PITCH_MAX) * sizeof(int16_t));
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(FRAME_LEN + PITCH_MAX) * sizeof(*p->excitation));
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memset(out, 0, (FRAME_LEN + LPC_ORDER) * sizeof(int16_t));
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} else {
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/* Regenerate frame */
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@ -1068,7 +1074,7 @@ static int g723_1_decode_frame(AVCodecContext *avctx, void *data,
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}
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/* Save the excitation for the next frame */
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memcpy(p->prev_excitation, p->excitation + FRAME_LEN,
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PITCH_MAX * sizeof(int16_t));
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PITCH_MAX * sizeof(*p->excitation));
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} else {
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memset(out, 0, sizeof(int16_t)*FRAME_LEN);
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av_log(avctx, AV_LOG_WARNING,
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@ -25,8 +25,8 @@
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* G723.1 compatible decoder data tables
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*/
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#ifndef AVCODEC_G729_1_DATA_H
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#define AVCODEC_G729_1_DATA_H
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#ifndef AVCODEC_G723_1_DATA_H
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#define AVCODEC_G723_1_DATA_H
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#include <stdint.h>
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@ -55,7 +55,7 @@ typedef enum FrameType {
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UNTRANSMITTED_FRAME
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} FrameType;
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static const uint8_t frame_size[4] = {24, 20, 4, 1};
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static const uint8_t frame_size[4] = { 24, 20, 4, 1 };
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typedef enum Rate {
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RATE_6300,
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@ -1319,4 +1319,4 @@ static const int16_t percept_flt_tbl[2][LPC_ORDER] = {
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{16384, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32}
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};
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#endif /* AVCODEC_G729_1_DATA_H */
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#endif /* AVCODEC_G723_1_DATA_H */
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