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ffmpeg.wasm-core
Commit cf139541 authored by Reynaldo H. Verdejo Pinochet's avatar Reynaldo H. Verdejo Pinochet
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Trivial, Cosmetics, mostly brace placement changes 

Originally committed as revision 15984 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 3e16cde4
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Showing with 147 additions and 113 deletions
libavcodec/qcelpdec.c
View file @ cf139541
......@@ -49,25 +49,26 @@ typedef enum
RATE_FULL
} qcelp_packet_rate;
typedef struct {
typedef struct
{
GetBitContext gb;
qcelp_packet_rate bitrate;
QCELPFrame frame; /*!< unpacked data frame */
uint8_t erasure_count;
uint8_t octave_count; /*!< count the consecutive RATE_OCTAVE frames */
float prev_lspf[10];
float predictor_lspf[10]; /*!< LSP predictor,
only use for RATE_OCTAVE and I_F_Q */
float pitch_synthesis_filter_mem[303];
float pitch_pre_filter_mem[303];
float rnd_fir_filter_mem[180];
float formant_mem[170];
float last_codebook_gain;
int prev_g1[2];
int prev_bitrate;
float pitch_gain[4];
uint8_t pitch_lag[4];
uint16_t first16bits;
QCELPFrame frame; /*!< unpacked data frame */
uint8_t erasure_count;
uint8_t octave_count; /*!< count the consecutive RATE_OCTAVE frames */
float prev_lspf[10];
float predictor_lspf[10];/*!< LSP predictor, only use for RATE_OCTAVE and I_F_Q */
float pitch_synthesis_filter_mem[303];
float pitch_pre_filter_mem[303];
float rnd_fir_filter_mem[180];
float formant_mem[170];
float last_codebook_gain;
int prev_g1[2];
int prev_bitrate;
float pitch_gain[4];
uint8_t pitch_lag[4];
uint16_t first16bits;
} QCELPContext;
/**
......@@ -100,8 +101,8 @@ static av_cold int qcelp_decode_init(AVCodecContext *avctx)
avctx->sample_fmt = SAMPLE_FMT_FLT;
for (i = 0; i < 10; i++)
q->prev_lspf[i] = (i + 1) / 11.;
for(i=0; i<10; i++)
q->prev_lspf[i] = (i+1)/11.;
return 0;
}
......@@ -120,14 +121,14 @@ static av_cold int qcelp_decode_init(AVCodecContext *avctx)
static int decode_lspf(QCELPContext *q, float *lspf)
{
int i;
float tmp_lspf;
float tmp_lspf, smooth, erasure_coeff;
const float *predictors;
if(q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q)
{
float smooth;
const float *predictors = (q->prev_bitrate != RATE_OCTAVE &&
q->prev_bitrate != I_F_Q ? q->prev_lspf
: q->predictor_lspf);
predictors = (q->prev_bitrate != RATE_OCTAVE &&
q->prev_bitrate != I_F_Q ?
q->prev_lspf : q->predictor_lspf);
if(q->bitrate == RATE_OCTAVE)
{
......@@ -144,7 +145,7 @@ static int decode_lspf(QCELPContext *q, float *lspf)
smooth = (q->octave_count < 10 ? .875 : 0.1);
}else
{
float erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
assert(q->bitrate == I_F_Q);
......@@ -215,21 +216,26 @@ static void decode_gain_and_index(QCELPContext *q,
int i, subframes_count, g1[16];
float slope;
if (q->bitrate >= RATE_QUARTER) {
switch (q->bitrate) {
if(q->bitrate >= RATE_QUARTER)
{
switch(q->bitrate)
{
case RATE_FULL: subframes_count = 16; break;
case RATE_HALF: subframes_count = 4; break;
default: subframes_count = 5;
}
for (i = 0; i < subframes_count; i++) {
for(i=0; i<subframes_count; i++)
{
g1[i] = 4 * q->frame.cbgain[i];
if (q->bitrate == RATE_FULL && !((i+1) & 3)) {
if(q->bitrate == RATE_FULL && !((i+1) & 3))
{
g1[i] += av_clip((g1[i-1] + g1[i-2] + g1[i-3]) / 3 - 6, 0, 32);
}
gain[i] = qcelp_g12ga[g1[i]];
if (q->frame.cbsign[i]) {
if(q->frame.cbsign[i])
{
gain[i] = -gain[i];
q->frame.cindex[i] = (q->frame.cindex[i]-89) & 127;
}
......@@ -239,7 +245,8 @@ static void decode_gain_and_index(QCELPContext *q,
q->prev_g1[1] = g1[i-1];
q->last_codebook_gain = qcelp_g12ga[g1[i-1]];
if (q->bitrate == RATE_QUARTER) {
if(q->bitrate == RATE_QUARTER)
{
// Provide smoothing of the unvoiced excitation energy.
gain[7] = gain[4];
gain[6] = 0.4*gain[3] + 0.6*gain[4];
......@@ -249,31 +256,35 @@ static void decode_gain_and_index(QCELPContext *q,
gain[2] = gain[1];
gain[1] = 0.6*gain[0] + 0.4*gain[1];
}
} else {
if (q->bitrate == RATE_OCTAVE) {
}else
{
if(q->bitrate == RATE_OCTAVE)
{
g1[0] = 2 * q->frame.cbgain[0]
+ av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
subframes_count = 8;
} else {
}else
{
assert(q->bitrate == I_F_Q);
g1[0] = q->prev_g1[1];
switch (q->erasure_count) {
case 1 : break;
case 2 : g1[0] -= 1; break;
case 3 : g1[0] -= 2; break;
default: g1[0] -= 6;
switch(q->erasure_count)
{
case 1 : break;
case 2 : g1[0] -= 1; break;
case 3 : g1[0] -= 2; break;
default: g1[0] -= 6;
}
if (g1[0] < 0)
if(g1[0] < 0)
g1[0] = 0;
subframes_count = 4;
}
// This interpolation is done to produce smoother background noise.
slope = 0.5*(qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
for (i = 1; i <= subframes_count; i++)
for(i=1; i<=subframes_count; i++)
gain[i-1] = q->last_codebook_gain + slope * i;
q->last_codebook_gain = gain[i-2];
q->last_codebook_gain = gain[i-2];
q->prev_g1[0] = q->prev_g1[1];
q->prev_g1[1] = g1[0];
}
......@@ -290,11 +301,11 @@ static void decode_gain_and_index(QCELPContext *q,
*/
static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
{
int i, prev_diff=0;
int i, diff, prev_diff=0;
for(i=1; i<5; i++)
{
int diff = cbgain[i] - cbgain[i-1];
diff = cbgain[i] - cbgain[i-1];
if(FFABS(diff) > 10)
return -1;
else if(FFABS(diff - prev_diff) > 12)
......@@ -501,46 +512,54 @@ static const float *do_pitchfilter(float memory[303], const float v_in[160],
* @param q the context
* @param cdn_vector the scaled codebook vector
*/
static void apply_pitch_filters(QCELPContext *q,
float *cdn_vector) {
static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
{
int i;
const float *v_synthesis_filtered, *v_pre_filtered;
if (q->bitrate >= RATE_HALF ||
(q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF))) {
if(q->bitrate >= RATE_HALF ||
(q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF)))
{
if (q->bitrate >= RATE_HALF) {
if(q->bitrate >= RATE_HALF)
{
// Compute gain & lag for the whole frame.
for (i = 0; i < 4; i++) {
for(i=0; i<4; i++)
{
q->pitch_gain[i] = q->frame.plag[i] ? (q->frame.pgain[i] + 1) * 0.25 : 0.0;
q->pitch_lag[i] = q->frame.plag[i] + 16;
}
} else {
float max_pitch_gain = q->erasure_count < 3 ? 0.9 - 0.3 * (q->erasure_count - 1)
: 0.0;
for (i = 0; i < 4; i++)
}else
{
float max_pitch_gain = q->erasure_count < 3 ? 0.9 - 0.3 * (q->erasure_count - 1) : 0.0;
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));
}
// pitch synthesis filter
v_synthesis_filtered = do_pitchfilter(q->pitch_synthesis_filter_mem, cdn_vector,
q->pitch_gain, q->pitch_lag, q->frame.pfrac);
v_synthesis_filtered = do_pitchfilter(q->pitch_synthesis_filter_mem,
cdn_vector, q->pitch_gain,
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_pre_filter_mem, cdn_vector + 17, 143 * sizeof(float));
}else
{
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));
}
......@@ -575,7 +594,8 @@ void interpolate_lpc(QCELPContext *q, const float *curr_lspf, float *lpc,
weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
weight, 1.0 - weight, 10);
ff_qcelp_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))
ff_qcelp_lspf2lpc(curr_lspf, lpc);
}
......@@ -583,16 +603,11 @@ static int 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 -1;
......@@ -610,27 +625,34 @@ static int buf_size2bitrate(const int buf_size)
*
* TIA/EIA/IS-733 2.4.8.7.1
*/
static int determine_bitrate(AVCodecContext *avctx,
const int buf_size,
uint8_t **buf) {
static int determine_bitrate(AVCodecContext *avctx, const int buf_size,
uint8_t **buf)
{
qcelp_packet_rate bitrate;
if ((bitrate = buf_size2bitrate(buf_size)) >= 0) {
if (bitrate > **buf) {
av_log(avctx, AV_LOG_WARNING, "Claimed bitrate and buffer size mismatch.\n");
if((bitrate = buf_size2bitrate(buf_size)) >= 0)
{
if(bitrate > **buf)
{
av_log(avctx, AV_LOG_WARNING,
"Claimed bitrate and buffer size mismatch.\n");
bitrate = **buf;
} else if (bitrate < **buf) {
av_log(avctx, AV_LOG_ERROR, "Buffer is too small for the claimed bitrate.\n");
}else if(bitrate < **buf)
{
av_log(avctx, AV_LOG_ERROR,
"Buffer is too small for the claimed bitrate.\n");
return I_F_Q;
}
(*buf)++;
} else if ((bitrate = buf_size2bitrate(buf_size + 1)) >= 0) {
}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) {
if(bitrate == SILENCE)
{
// FIXME: the decoder should not handle SILENCE frames as I_F_Q frames
av_log_missing_feature(avctx, "Blank frame", 1);
bitrate = I_F_Q;
......@@ -645,30 +667,31 @@ static void warn_insufficient_frame_quality(AVCodecContext *avctx,
message);
}
static int qcelp_decode_frame(AVCodecContext *avctx,
void *data,
int *data_size,
uint8_t *buf,
const int buf_size) {
QCELPContext *q = avctx->priv_data;
float *outbuffer = data;
int i;
float quantized_lspf[10], lpc[10];
float gain[16];
float *formant_mem;
if ((q->bitrate = determine_bitrate(avctx, buf_size, &buf)) == I_F_Q) {
static int qcelp_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
uint8_t *buf, const int buf_size)
{
QCELPContext *q = avctx->priv_data;
float *outbuffer = data;
int i;
float quantized_lspf[10], lpc[10];
float gain[16];
float *formant_mem;
if((q->bitrate = determine_bitrate(avctx, buf_size, &buf)) == I_F_Q)
{
warn_insufficient_frame_quality(avctx, "bitrate cannot be determined.");
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) {
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];
......@@ -678,22 +701,28 @@ static int qcelp_decode_frame(AVCodecContext *avctx,
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.
if (q->frame.reserved) {
if(q->frame.reserved)
{
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;
}
if (q->bitrate >= RATE_HALF) {
for (i = 0; i < 4; i++) {
if (q->frame.pfrac[i] && q->frame.plag[i] >= 124) {
if(q->bitrate >= RATE_HALF)
{
for(i=0; i<4; i++)
{
if(q->frame.pfrac[i] && q->frame.plag[i] >= 124)
{
warn_insufficient_frame_quality(avctx, "Cannot initialize pitch filter.");
goto erasure;
}
......@@ -704,7 +733,8 @@ static int qcelp_decode_frame(AVCodecContext *avctx,
decode_gain_and_index(q, gain);
compute_svector(q, gain, outbuffer);
if (decode_lspf(q, quantized_lspf) < 0) {
if(decode_lspf(q, quantized_lspf) < 0)
{
warn_insufficient_frame_quality(avctx, "Badly received packets in frame.");
goto erasure;
}
......@@ -712,7 +742,8 @@ static int qcelp_decode_frame(AVCodecContext *avctx,
apply_pitch_filters(q, outbuffer);
if (q->bitrate == I_F_Q) {
if(q->bitrate == I_F_Q)
{
erasure:
q->bitrate = I_F_Q;
q->erasure_count++;
......@@ -720,13 +751,15 @@ 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++) {
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;
}
memcpy(q->formant_mem, q->formant_mem + 160, 10 * sizeof(float));
......@@ -735,8 +768,9 @@ erasure:
// TIA/EIA/IS-733 2.4.8.6
formant_mem = q->formant_mem + 10;
for (i = 0; i < 160; i++)
*outbuffer++ = av_clipf(*formant_mem++, QCELP_CLIP_LOWER_BOUND, QCELP_CLIP_UPPER_BOUND);
for(i=0; i<160; i++)
*outbuffer++ = av_clipf(*formant_mem++, QCELP_CLIP_LOWER_BOUND,
QCELP_CLIP_UPPER_BOUND);
memcpy(q->prev_lspf, quantized_lspf, sizeof(q->prev_lspf));
q->prev_bitrate = q->bitrate;
......
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