qcelpdec: K&R formatting cosmetics
Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Asen Lekov
Diego Biurrun
parent
2fd291846b
commit
25c2d76b68
@ -44,8 +44,7 @@
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#undef NDEBUG
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#include <assert.h>
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typedef enum
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{
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typedef enum {
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I_F_Q = -1, /**< insufficient frame quality */
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SILENCE,
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RATE_OCTAVE,
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@ -54,8 +53,7 @@ typedef enum
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RATE_FULL
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} qcelp_packet_rate;
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typedef struct
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{
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typedef struct {
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AVFrame avframe;
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GetBitContext gb;
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qcelp_packet_rate bitrate;
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@ -95,8 +93,8 @@ static av_cold int qcelp_decode_init(AVCodecContext *avctx)
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avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
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for(i=0; i<10; i++)
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q->prev_lspf[i] = (i+1)/11.;
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for (i = 0; i < 10; i++)
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q->prev_lspf[i] = (i + 1) / 11.;
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avcodec_get_frame_defaults(&q->avframe);
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avctx->coded_frame = &q->avframe;
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@ -129,12 +127,12 @@ static int decode_lspf(QCELPContext *q, float *lspf)
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if (q->bitrate == RATE_OCTAVE) {
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q->octave_count++;
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for (i=0; i<10; i++) {
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for (i = 0; i < 10; i++) {
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q->predictor_lspf[i] =
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lspf[i] = (q->frame.lspv[i] ? QCELP_LSP_SPREAD_FACTOR
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: -QCELP_LSP_SPREAD_FACTOR)
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+ predictors[i] * QCELP_LSP_OCTAVE_PREDICTOR
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+ (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR)/11);
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: -QCELP_LSP_SPREAD_FACTOR) +
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predictors[i] * QCELP_LSP_OCTAVE_PREDICTOR +
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(i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR) / 11);
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}
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smooth = q->octave_count < 10 ? .875 : 0.1;
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} else {
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@ -142,49 +140,49 @@ static int decode_lspf(QCELPContext *q, float *lspf)
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assert(q->bitrate == I_F_Q);
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if(q->erasure_count > 1)
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if (q->erasure_count > 1)
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erasure_coeff *= q->erasure_count < 4 ? 0.9 : 0.7;
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for(i = 0; i < 10; i++) {
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for (i = 0; i < 10; i++) {
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q->predictor_lspf[i] =
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lspf[i] = (i + 1) * ( 1 - erasure_coeff)/11
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+ erasure_coeff * predictors[i];
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lspf[i] = (i + 1) * (1 - erasure_coeff) / 11 +
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erasure_coeff * predictors[i];
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}
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smooth = 0.125;
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}
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// Check the stability of the LSP frequencies.
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lspf[0] = FFMAX(lspf[0], QCELP_LSP_SPREAD_FACTOR);
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for(i=1; i<10; i++)
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for (i = 1; i < 10; i++)
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lspf[i] = FFMAX(lspf[i], lspf[i - 1] + QCELP_LSP_SPREAD_FACTOR);
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lspf[9] = FFMIN(lspf[9], 1.0 - QCELP_LSP_SPREAD_FACTOR);
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for(i=9; i>0; i--)
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for (i = 9; i > 0; i--)
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lspf[i - 1] = FFMIN(lspf[i - 1], lspf[i] - QCELP_LSP_SPREAD_FACTOR);
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// Low-pass filter the LSP frequencies.
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ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
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ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0 - smooth, 10);
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} else {
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q->octave_count = 0;
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tmp_lspf = 0.;
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for (i = 0; i < 5; i++) {
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lspf[2*i+0] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][0] * 0.0001;
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lspf[2*i+1] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][1] * 0.0001;
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lspf[2 * i + 0] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][0] * 0.0001;
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lspf[2 * i + 1] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][1] * 0.0001;
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}
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// Check for badly received packets.
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if (q->bitrate == RATE_QUARTER) {
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if(lspf[9] <= .70 || lspf[9] >= .97)
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if (lspf[9] <= .70 || lspf[9] >= .97)
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return -1;
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for(i=3; i<10; i++)
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if(fabs(lspf[i] - lspf[i-2]) < .08)
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for (i = 3; i < 10; i++)
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if (fabs(lspf[i] - lspf[i - 2]) < .08)
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return -1;
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} else {
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if(lspf[9] <= .66 || lspf[9] >= .985)
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if (lspf[9] <= .66 || lspf[9] >= .985)
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return -1;
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for(i=4; i<10; i++)
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if (fabs(lspf[i] - lspf[i-4]) < .0931)
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for (i = 4; i < 10; i++)
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if (fabs(lspf[i] - lspf[i - 4]) < .0931)
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return -1;
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}
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}
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@ -199,72 +197,72 @@ static int decode_lspf(QCELPContext *q, float *lspf)
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*
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* TIA/EIA/IS-733 2.4.6.2
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*/
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static void decode_gain_and_index(QCELPContext *q,
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float *gain) {
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int i, subframes_count, g1[16];
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static void decode_gain_and_index(QCELPContext *q, float *gain)
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{
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int i, subframes_count, g1[16];
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float slope;
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if (q->bitrate >= RATE_QUARTER) {
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switch (q->bitrate) {
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case RATE_FULL: subframes_count = 16; break;
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case RATE_HALF: subframes_count = 4; break;
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default: subframes_count = 5;
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case RATE_FULL: subframes_count = 16; break;
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case RATE_HALF: subframes_count = 4; break;
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default: subframes_count = 5;
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}
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for(i = 0; i < subframes_count; i++) {
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for (i = 0; i < subframes_count; i++) {
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g1[i] = 4 * q->frame.cbgain[i];
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if (q->bitrate == RATE_FULL && !((i+1) & 3)) {
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g1[i] += av_clip((g1[i-1] + g1[i-2] + g1[i-3]) / 3 - 6, 0, 32);
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if (q->bitrate == RATE_FULL && !((i + 1) & 3)) {
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g1[i] += av_clip((g1[i - 1] + g1[i - 2] + g1[i - 3]) / 3 - 6, 0, 32);
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}
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gain[i] = qcelp_g12ga[g1[i]];
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if (q->frame.cbsign[i]) {
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gain[i] = -gain[i];
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q->frame.cindex[i] = (q->frame.cindex[i]-89) & 127;
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q->frame.cindex[i] = (q->frame.cindex[i] - 89) & 127;
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}
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}
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q->prev_g1[0] = g1[i-2];
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q->prev_g1[1] = g1[i-1];
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q->last_codebook_gain = qcelp_g12ga[g1[i-1]];
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q->prev_g1[0] = g1[i - 2];
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q->prev_g1[1] = g1[i - 1];
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q->last_codebook_gain = qcelp_g12ga[g1[i - 1]];
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if (q->bitrate == RATE_QUARTER) {
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// Provide smoothing of the unvoiced excitation energy.
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gain[7] = gain[4];
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gain[6] = 0.4*gain[3] + 0.6*gain[4];
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gain[5] = gain[3];
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gain[4] = 0.8*gain[2] + 0.2*gain[3];
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gain[3] = 0.2*gain[1] + 0.8*gain[2];
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gain[2] = gain[1];
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gain[1] = 0.6*gain[0] + 0.4*gain[1];
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gain[7] = gain[4];
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gain[6] = 0.4 * gain[3] + 0.6 * gain[4];
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gain[5] = gain[3];
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gain[4] = 0.8 * gain[2] + 0.2 * gain[3];
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gain[3] = 0.2 * gain[1] + 0.8 * gain[2];
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gain[2] = gain[1];
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gain[1] = 0.6 * gain[0] + 0.4 * gain[1];
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}
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} else if (q->bitrate != SILENCE) {
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if (q->bitrate == RATE_OCTAVE) {
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g1[0] = 2 * q->frame.cbgain[0]
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+ av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
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g1[0] = 2 * q->frame.cbgain[0] +
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av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
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subframes_count = 8;
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} else {
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assert(q->bitrate == I_F_Q);
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g1[0] = q->prev_g1[1];
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switch (q->erasure_count) {
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case 1 : break;
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case 2 : g1[0] -= 1; break;
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case 3 : g1[0] -= 2; break;
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default: g1[0] -= 6;
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case 1 : break;
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case 2 : g1[0] -= 1; break;
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case 3 : g1[0] -= 2; break;
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default: g1[0] -= 6;
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}
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if(g1[0] < 0)
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if (g1[0] < 0)
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g1[0] = 0;
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subframes_count = 4;
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}
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// This interpolation is done to produce smoother background noise.
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slope = 0.5*(qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
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for(i=1; i<=subframes_count; i++)
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gain[i-1] = q->last_codebook_gain + slope * i;
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slope = 0.5 * (qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
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for (i = 1; i <= subframes_count; i++)
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gain[i - 1] = q->last_codebook_gain + slope * i;
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q->last_codebook_gain = gain[i-2];
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q->prev_g1[0] = q->prev_g1[1];
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q->prev_g1[1] = g1[0];
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q->last_codebook_gain = gain[i - 2];
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q->prev_g1[0] = q->prev_g1[1];
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q->prev_g1[1] = g1[0];
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}
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}
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@ -279,13 +277,13 @@ static void decode_gain_and_index(QCELPContext *q,
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*/
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static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
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{
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int i, diff, prev_diff=0;
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int i, diff, prev_diff = 0;
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for(i=1; i<5; i++) {
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for (i = 1; i < 5; i++) {
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diff = cbgain[i] - cbgain[i-1];
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if(FFABS(diff) > 10)
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if (FFABS(diff) > 10)
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return -1;
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else if(FFABS(diff - prev_diff) > 12)
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else if (FFABS(diff - prev_diff) > 12)
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return -1;
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prev_diff = diff;
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}
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@ -316,73 +314,74 @@ static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
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static void compute_svector(QCELPContext *q, const float *gain,
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float *cdn_vector)
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{
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int i, j, k;
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int i, j, k;
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uint16_t cbseed, cindex;
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float *rnd, tmp_gain, fir_filter_value;
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float *rnd, tmp_gain, fir_filter_value;
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switch (q->bitrate) {
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case RATE_FULL:
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for (i = 0; i < 16; i++) {
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tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
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cindex = -q->frame.cindex[i];
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for(j=0; j<10; j++)
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*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
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}
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case RATE_FULL:
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for (i = 0; i < 16; i++) {
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tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
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cindex = -q->frame.cindex[i];
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for (j = 0; j < 10; j++)
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*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
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}
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break;
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case RATE_HALF:
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for (i = 0; i < 4; i++) {
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tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
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cindex = -q->frame.cindex[i];
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for (j = 0; j < 40; j++)
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case RATE_HALF:
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for (i = 0; i < 4; i++) {
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tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
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cindex = -q->frame.cindex[i];
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for (j = 0; j < 40; j++)
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*cdn_vector++ = tmp_gain * qcelp_rate_half_codebook[cindex++ & 127];
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}
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}
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break;
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case RATE_QUARTER:
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cbseed = (0x0003 & q->frame.lspv[4])<<14 |
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(0x003F & q->frame.lspv[3])<< 8 |
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(0x0060 & q->frame.lspv[2])<< 1 |
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(0x0007 & q->frame.lspv[1])<< 3 |
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(0x0038 & q->frame.lspv[0])>> 3 ;
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rnd = q->rnd_fir_filter_mem + 20;
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for (i = 0; i < 8; i++) {
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tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
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for (k = 0; k < 20; k++) {
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cbseed = 521 * cbseed + 259;
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*rnd = (int16_t)cbseed;
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case RATE_QUARTER:
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cbseed = (0x0003 & q->frame.lspv[4]) << 14 |
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(0x003F & q->frame.lspv[3]) << 8 |
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(0x0060 & q->frame.lspv[2]) << 1 |
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(0x0007 & q->frame.lspv[1]) << 3 |
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(0x0038 & q->frame.lspv[0]) >> 3;
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rnd = q->rnd_fir_filter_mem + 20;
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for (i = 0; i < 8; i++) {
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tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
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for (k = 0; k < 20; k++) {
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cbseed = 521 * cbseed + 259;
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*rnd = (int16_t) cbseed;
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// FIR filter
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fir_filter_value = 0.0;
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for(j=0; j<10; j++)
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fir_filter_value += qcelp_rnd_fir_coefs[j ]
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* (rnd[-j ] + rnd[-20+j]);
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fir_filter_value = 0.0;
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for (j = 0; j < 10; j++)
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fir_filter_value += qcelp_rnd_fir_coefs[j] *
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(rnd[-j] + rnd[-20+j]);
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fir_filter_value += qcelp_rnd_fir_coefs[10] * rnd[-10];
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*cdn_vector++ = tmp_gain * fir_filter_value;
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rnd++;
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}
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fir_filter_value += qcelp_rnd_fir_coefs[10] * rnd[-10];
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*cdn_vector++ = tmp_gain * fir_filter_value;
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rnd++;
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}
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memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160, 20 * sizeof(float));
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}
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memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160,
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20 * sizeof(float));
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break;
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case RATE_OCTAVE:
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cbseed = q->first16bits;
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for (i = 0; i < 8; i++) {
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tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
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for (j = 0; j < 20; j++) {
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cbseed = 521 * cbseed + 259;
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*cdn_vector++ = tmp_gain * (int16_t)cbseed;
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}
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case RATE_OCTAVE:
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cbseed = q->first16bits;
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for (i = 0; i < 8; i++) {
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tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
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for (j = 0; j < 20; j++) {
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cbseed = 521 * cbseed + 259;
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*cdn_vector++ = tmp_gain * (int16_t) cbseed;
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}
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}
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break;
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case I_F_Q:
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cbseed = -44; // random codebook index
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for (i = 0; i < 4; i++) {
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tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
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for(j=0; j<40; j++)
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*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
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}
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case I_F_Q:
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cbseed = -44; // random codebook index
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for (i = 0; i < 4; i++) {
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tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
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for (j = 0; j < 40; j++)
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*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
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}
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break;
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case SILENCE:
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memset(cdn_vector, 0, 160 * sizeof(float));
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case SILENCE:
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memset(cdn_vector, 0, 160 * sizeof(float));
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break;
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}
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}
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@ -396,8 +395,7 @@ static void compute_svector(QCELPContext *q, const float *gain,
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*
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* TIA/EIA/IS-733 2.4.8.3, 2.4.8.6
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*/
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static void apply_gain_ctrl(float *v_out, const float *v_ref,
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const float *v_in)
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static void apply_gain_ctrl(float *v_out, const float *v_ref, const float *v_in)
|
||||
{
|
||||
int i;
|
||||
|
||||
@ -429,8 +427,8 @@ static const float *do_pitchfilter(float memory[303], const float v_in[160],
|
||||
const float gain[4], const uint8_t *lag,
|
||||
const uint8_t pfrac[4])
|
||||
{
|
||||
int i, j;
|
||||
float *v_lag, *v_out;
|
||||
int i, j;
|
||||
float *v_lag, *v_out;
|
||||
const float *v_len;
|
||||
|
||||
v_out = memory + 143; // Output vector starts at memory[143].
|
||||
@ -440,9 +438,9 @@ static const float *do_pitchfilter(float memory[303], const float v_in[160],
|
||||
v_lag = memory + 143 + 40 * i - lag[i];
|
||||
for (v_len = v_in + 40; v_in < v_len; v_in++) {
|
||||
if (pfrac[i]) { // If it is a fractional lag...
|
||||
for(j=0, *v_out=0.; j<4; j++)
|
||||
*v_out += qcelp_hammsinc_table[j] * (v_lag[j-4] + v_lag[3-j]);
|
||||
}else
|
||||
for (j = 0, *v_out = 0.; j < 4; j++)
|
||||
*v_out += qcelp_hammsinc_table[j] * (v_lag[j - 4] + v_lag[3 - j]);
|
||||
} else
|
||||
*v_out = *v_lag;
|
||||
|
||||
*v_out = *v_in + gain[i] * *v_out;
|
||||
@ -470,15 +468,13 @@ static const float *do_pitchfilter(float memory[303], const float v_in[160],
|
||||
*/
|
||||
static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
|
||||
{
|
||||
int i;
|
||||
int i;
|
||||
const float *v_synthesis_filtered, *v_pre_filtered;
|
||||
|
||||
if(q->bitrate >= RATE_HALF ||
|
||||
q->bitrate == SILENCE ||
|
||||
(q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF))) {
|
||||
|
||||
if(q->bitrate >= RATE_HALF) {
|
||||
if (q->bitrate >= RATE_HALF || q->bitrate == SILENCE ||
|
||||
(q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF))) {
|
||||
|
||||
if (q->bitrate >= RATE_HALF) {
|
||||
// Compute gain & lag for the whole frame.
|
||||
for (i = 0; i < 4; i++) {
|
||||
q->pitch_gain[i] = q->frame.plag[i] ? (q->frame.pgain[i] + 1) * 0.25 : 0.0;
|
||||
@ -497,7 +493,7 @@ static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
|
||||
assert(q->bitrate == SILENCE);
|
||||
max_pitch_gain = 1.0;
|
||||
}
|
||||
for(i=0; i<4; i++)
|
||||
for (i = 0; i < 4; i++)
|
||||
q->pitch_gain[i] = FFMIN(q->pitch_gain[i], max_pitch_gain);
|
||||
|
||||
memset(q->frame.pfrac, 0, sizeof(q->frame.pfrac));
|
||||
@ -509,18 +505,17 @@ static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
|
||||
q->pitch_lag, q->frame.pfrac);
|
||||
|
||||
// pitch prefilter update
|
||||
for(i=0; i<4; i++)
|
||||
for (i = 0; i < 4; i++)
|
||||
q->pitch_gain[i] = 0.5 * FFMIN(q->pitch_gain[i], 1.0);
|
||||
|
||||
v_pre_filtered = do_pitchfilter(q->pitch_pre_filter_mem,
|
||||
v_synthesis_filtered,
|
||||
q->pitch_gain, q->pitch_lag,
|
||||
q->frame.pfrac);
|
||||
v_pre_filtered = do_pitchfilter(q->pitch_pre_filter_mem,
|
||||
v_synthesis_filtered,
|
||||
q->pitch_gain, q->pitch_lag,
|
||||
q->frame.pfrac);
|
||||
|
||||
apply_gain_ctrl(cdn_vector, v_synthesis_filtered, v_pre_filtered);
|
||||
} else {
|
||||
memcpy(q->pitch_synthesis_filter_mem, cdn_vector + 17,
|
||||
143 * sizeof(float));
|
||||
memcpy(q->pitch_synthesis_filter_mem, cdn_vector + 17, 143 * sizeof(float));
|
||||
memcpy(q->pitch_pre_filter_mem, cdn_vector + 17, 143 * sizeof(float));
|
||||
memset(q->pitch_gain, 0, sizeof(q->pitch_gain));
|
||||
memset(q->pitch_lag, 0, sizeof(q->pitch_lag));
|
||||
@ -543,15 +538,15 @@ static void lspf2lpc(const float *lspf, float *lpc)
|
||||
{
|
||||
double lsp[10];
|
||||
double bandwidth_expansion_coeff = QCELP_BANDWIDTH_EXPANSION_COEFF;
|
||||
int i;
|
||||
int i;
|
||||
|
||||
for (i=0; i<10; i++)
|
||||
for (i = 0; i < 10; i++)
|
||||
lsp[i] = cos(M_PI * lspf[i]);
|
||||
|
||||
ff_acelp_lspd2lpc(lsp, lpc, 5);
|
||||
|
||||
for (i = 0; i < 10; i++) {
|
||||
lpc[i] *= bandwidth_expansion_coeff;
|
||||
lpc[i] *= bandwidth_expansion_coeff;
|
||||
bandwidth_expansion_coeff *= QCELP_BANDWIDTH_EXPANSION_COEFF;
|
||||
}
|
||||
}
|
||||
@ -573,9 +568,9 @@ static void interpolate_lpc(QCELPContext *q, const float *curr_lspf,
|
||||
float interpolated_lspf[10];
|
||||
float weight;
|
||||
|
||||
if(q->bitrate >= RATE_QUARTER)
|
||||
if (q->bitrate >= RATE_QUARTER)
|
||||
weight = 0.25 * (subframe_num + 1);
|
||||
else if(q->bitrate == RATE_OCTAVE && !subframe_num)
|
||||
else if (q->bitrate == RATE_OCTAVE && !subframe_num)
|
||||
weight = 0.625;
|
||||
else
|
||||
weight = 1.0;
|
||||
@ -584,21 +579,21 @@ static void interpolate_lpc(QCELPContext *q, const float *curr_lspf,
|
||||
ff_weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
|
||||
weight, 1.0 - weight, 10);
|
||||
lspf2lpc(interpolated_lspf, lpc);
|
||||
}else if(q->bitrate >= RATE_QUARTER ||
|
||||
(q->bitrate == I_F_Q && !subframe_num))
|
||||
} else if (q->bitrate >= RATE_QUARTER ||
|
||||
(q->bitrate == I_F_Q && !subframe_num))
|
||||
lspf2lpc(curr_lspf, lpc);
|
||||
else if(q->bitrate == SILENCE && !subframe_num)
|
||||
else if (q->bitrate == SILENCE && !subframe_num)
|
||||
lspf2lpc(q->prev_lspf, lpc);
|
||||
}
|
||||
|
||||
static qcelp_packet_rate buf_size2bitrate(const int buf_size)
|
||||
{
|
||||
switch (buf_size) {
|
||||
case 35: return RATE_FULL;
|
||||
case 17: return RATE_HALF;
|
||||
case 8: return RATE_QUARTER;
|
||||
case 4: return RATE_OCTAVE;
|
||||
case 1: return SILENCE;
|
||||
case 35: return RATE_FULL;
|
||||
case 17: return RATE_HALF;
|
||||
case 8: return RATE_QUARTER;
|
||||
case 4: return RATE_OCTAVE;
|
||||
case 1: return SILENCE;
|
||||
}
|
||||
|
||||
return I_F_Q;
|
||||
@ -616,8 +611,9 @@ static qcelp_packet_rate buf_size2bitrate(const int buf_size)
|
||||
*
|
||||
* TIA/EIA/IS-733 2.4.8.7.1
|
||||
*/
|
||||
static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx, const int buf_size,
|
||||
const uint8_t **buf)
|
||||
static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx,
|
||||
const int buf_size,
|
||||
const uint8_t **buf)
|
||||
{
|
||||
qcelp_packet_rate bitrate;
|
||||
|
||||
@ -639,7 +635,7 @@ static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx, const int buf_
|
||||
} else if ((bitrate = buf_size2bitrate(buf_size + 1)) >= 0) {
|
||||
av_log(avctx, AV_LOG_WARNING,
|
||||
"Bitrate byte is missing, guessing the bitrate from packet size.\n");
|
||||
}else
|
||||
} else
|
||||
return I_F_Q;
|
||||
|
||||
if (bitrate == SILENCE) {
|
||||
@ -652,8 +648,8 @@ static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx, const int buf_
|
||||
static void warn_insufficient_frame_quality(AVCodecContext *avctx,
|
||||
const char *message)
|
||||
{
|
||||
av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n", avctx->frame_number,
|
||||
message);
|
||||
av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n",
|
||||
avctx->frame_number, message);
|
||||
}
|
||||
|
||||
static void postfilter(QCELPContext *q, float *samples, float *lpc)
|
||||
@ -675,23 +671,24 @@ static void postfilter(QCELPContext *q, float *samples, float *lpc)
|
||||
|
||||
ff_celp_lp_zero_synthesis_filterf(zero_out, lpc_s,
|
||||
q->formant_mem + 10, 160, 10);
|
||||
memcpy(pole_out, q->postfilter_synth_mem, sizeof(float) * 10);
|
||||
memcpy(pole_out, q->postfilter_synth_mem, sizeof(float) * 10);
|
||||
ff_celp_lp_synthesis_filterf(pole_out + 10, lpc_p, zero_out, 160, 10);
|
||||
memcpy(q->postfilter_synth_mem, pole_out + 160, sizeof(float) * 10);
|
||||
|
||||
ff_tilt_compensation(&q->postfilter_tilt_mem, 0.3, pole_out + 10, 160);
|
||||
|
||||
ff_adaptive_gain_control(samples, pole_out + 10,
|
||||
ff_dot_productf(q->formant_mem + 10, q->formant_mem + 10, 160),
|
||||
160, 0.9375, &q->postfilter_agc_mem);
|
||||
ff_dot_productf(q->formant_mem + 10,
|
||||
q->formant_mem + 10, 160),
|
||||
160, 0.9375, &q->postfilter_agc_mem);
|
||||
}
|
||||
|
||||
static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
|
||||
int *got_frame_ptr, AVPacket *avpkt)
|
||||
{
|
||||
const uint8_t *buf = avpkt->data;
|
||||
int buf_size = avpkt->size;
|
||||
QCELPContext *q = avctx->priv_data;
|
||||
int buf_size = avpkt->size;
|
||||
QCELPContext *q = avctx->priv_data;
|
||||
float *outbuffer;
|
||||
int i, ret;
|
||||
float quantized_lspf[10], lpc[10];
|
||||
@ -711,23 +708,23 @@ static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
|
||||
goto erasure;
|
||||
}
|
||||
|
||||
if(q->bitrate == RATE_OCTAVE &&
|
||||
(q->first16bits = AV_RB16(buf)) == 0xFFFF) {
|
||||
if (q->bitrate == RATE_OCTAVE &&
|
||||
(q->first16bits = AV_RB16(buf)) == 0xFFFF) {
|
||||
warn_insufficient_frame_quality(avctx, "Bitrate is 1/8 and first 16 bits are on.");
|
||||
goto erasure;
|
||||
}
|
||||
|
||||
if (q->bitrate > SILENCE) {
|
||||
const QCELPBitmap *bitmaps = qcelp_unpacking_bitmaps_per_rate[q->bitrate];
|
||||
const QCELPBitmap *bitmaps_end = qcelp_unpacking_bitmaps_per_rate[q->bitrate]
|
||||
+ qcelp_unpacking_bitmaps_lengths[q->bitrate];
|
||||
uint8_t *unpacked_data = (uint8_t *)&q->frame;
|
||||
const QCELPBitmap *bitmaps_end = qcelp_unpacking_bitmaps_per_rate[q->bitrate] +
|
||||
qcelp_unpacking_bitmaps_lengths[q->bitrate];
|
||||
uint8_t *unpacked_data = (uint8_t *)&q->frame;
|
||||
|
||||
init_get_bits(&q->gb, buf, 8*buf_size);
|
||||
init_get_bits(&q->gb, buf, 8 * buf_size);
|
||||
|
||||
memset(&q->frame, 0, sizeof(QCELPFrame));
|
||||
|
||||
for(; bitmaps < bitmaps_end; bitmaps++)
|
||||
for (; bitmaps < bitmaps_end; bitmaps++)
|
||||
unpacked_data[bitmaps->index] |= get_bits(&q->gb, bitmaps->bitlen) << bitmaps->bitpos;
|
||||
|
||||
// Check for erasures/blanks on rates 1, 1/4 and 1/8.
|
||||
@ -735,8 +732,8 @@ static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
|
||||
warn_insufficient_frame_quality(avctx, "Wrong data in reserved frame area.");
|
||||
goto erasure;
|
||||
}
|
||||
if(q->bitrate == RATE_QUARTER &&
|
||||
codebook_sanity_check_for_rate_quarter(q->frame.cbgain)) {
|
||||
if (q->bitrate == RATE_QUARTER &&
|
||||
codebook_sanity_check_for_rate_quarter(q->frame.cbgain)) {
|
||||
warn_insufficient_frame_quality(avctx, "Codebook gain sanity check failed.");
|
||||
goto erasure;
|
||||
}
|
||||
@ -759,7 +756,6 @@ static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
|
||||
goto erasure;
|
||||
}
|
||||
|
||||
|
||||
apply_pitch_filters(q, outbuffer);
|
||||
|
||||
if (q->bitrate == I_F_Q) {
|
||||
@ -770,14 +766,13 @@ erasure:
|
||||
compute_svector(q, gain, outbuffer);
|
||||
decode_lspf(q, quantized_lspf);
|
||||
apply_pitch_filters(q, outbuffer);
|
||||
}else
|
||||
} else
|
||||
q->erasure_count = 0;
|
||||
|
||||
formant_mem = q->formant_mem + 10;
|
||||
for (i = 0; i < 4; i++) {
|
||||
interpolate_lpc(q, quantized_lspf, lpc, i);
|
||||
ff_celp_lp_synthesis_filterf(formant_mem, lpc, outbuffer + i * 40, 40,
|
||||
10);
|
||||
ff_celp_lp_synthesis_filterf(formant_mem, lpc, outbuffer + i * 40, 40, 10);
|
||||
formant_mem += 40;
|
||||
}
|
||||
|
||||
@ -787,7 +782,7 @@ erasure:
|
||||
memcpy(q->formant_mem, q->formant_mem + 160, 10 * sizeof(float));
|
||||
|
||||
memcpy(q->prev_lspf, quantized_lspf, sizeof(q->prev_lspf));
|
||||
q->prev_bitrate = q->bitrate;
|
||||
q->prev_bitrate = q->bitrate;
|
||||
|
||||
*got_frame_ptr = 1;
|
||||
*(AVFrame *)data = q->avframe;
|
||||
@ -795,14 +790,13 @@ erasure:
|
||||
return buf_size;
|
||||
}
|
||||
|
||||
AVCodec ff_qcelp_decoder =
|
||||
{
|
||||
.name = "qcelp",
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
.id = CODEC_ID_QCELP,
|
||||
.init = qcelp_decode_init,
|
||||
.decode = qcelp_decode_frame,
|
||||
.capabilities = CODEC_CAP_DR1,
|
||||
AVCodec ff_qcelp_decoder = {
|
||||
.name = "qcelp",
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
.id = CODEC_ID_QCELP,
|
||||
.init = qcelp_decode_init,
|
||||
.decode = qcelp_decode_frame,
|
||||
.capabilities = CODEC_CAP_DR1,
|
||||
.priv_data_size = sizeof(QCELPContext),
|
||||
.long_name = NULL_IF_CONFIG_SMALL("QCELP / PureVoice"),
|
||||
.long_name = NULL_IF_CONFIG_SMALL("QCELP / PureVoice"),
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user