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ffmpeg.wasm-core
Commit 2d2692eb authored by Justin Ruggles's avatar Justin Ruggles
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cosmetics: rename some fields in AC3EncodeContext 

Originally committed as revision 25948 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 9cb59032
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Showing with 37 additions and 37 deletions
libavcodec/ac3enc.c
View file @ 2d2692eb
......@@ -50,14 +50,14 @@ typedef struct AC3EncodeContext {
int bits_written;
int samples_written;
int nb_all_channels;
int nb_channels;
int lfe;
int fbw_channels;
int channels;
int lfe_on;
int lfe_channel;
int channel_mode;
const uint8_t *channel_map;
int chbwcod[AC3_MAX_CHANNELS];
int bandwidth_code[AC3_MAX_CHANNELS];
int nb_coefs[AC3_MAX_CHANNELS];
/* bitrate allocation control */
......@@ -432,7 +432,7 @@ static void bit_alloc_masking(AC3EncodeContext *s,
int16_t band_psd[NB_BLOCKS][AC3_MAX_CHANNELS][50];
for(blk=0; blk<NB_BLOCKS; blk++) {
for(ch=0;ch<s->nb_all_channels;ch++) {
for(ch=0;ch<s->channels;ch++) {
if(exp_strategy[blk][ch] == EXP_REUSE) {
memcpy(psd[blk][ch], psd[blk-1][ch], (N/2)*sizeof(int16_t));
memcpy(mask[blk][ch], mask[blk-1][ch], 50*sizeof(int16_t));
......@@ -467,7 +467,7 @@ static int bit_alloc(AC3EncodeContext *s,
s->mant1_cnt = 0;
s->mant2_cnt = 0;
s->mant4_cnt = 0;
for(ch=0;ch<s->nb_all_channels;ch++) {
for(ch=0;ch<s->channels;ch++) {
ff_ac3_bit_alloc_calc_bap(mask[i][ch], psd[i][ch], 0,
s->nb_coefs[ch], snr_offset,
s->bit_alloc.floor, ff_ac3_bap_tab,
......@@ -505,7 +505,7 @@ static int compute_bit_allocation(AC3EncodeContext *s,
s->slow_gain_code = 1;
s->db_per_bit_code = 2;
s->floor_code = 4;
for(ch=0;ch<s->nb_all_channels;ch++)
for(ch=0;ch<s->channels;ch++)
s->fast_gain_code[ch] = 4;
/* compute real values */
......@@ -525,15 +525,15 @@ static int compute_bit_allocation(AC3EncodeContext *s,
/* audio blocks */
for(i=0;i<NB_BLOCKS;i++) {
frame_bits += s->nb_channels * 2 + 2; /* blksw * c, dithflag * c, dynrnge, cplstre */
frame_bits += s->fbw_channels * 2 + 2; /* blksw * c, dithflag * c, dynrnge, cplstre */
if (s->channel_mode == AC3_CHMODE_STEREO) {
frame_bits++; /* rematstr */
if(i==0) frame_bits += 4;
}
frame_bits += 2 * s->nb_channels; /* chexpstr[2] * c */
if (s->lfe)
frame_bits += 2 * s->fbw_channels; /* chexpstr[2] * c */
if (s->lfe_on)
frame_bits++; /* lfeexpstr */
for(ch=0;ch<s->nb_channels;ch++) {
for(ch=0;ch<s->fbw_channels;ch++) {
if (exp_strategy[i][ch] != EXP_REUSE)
frame_bits += 6 + 2; /* chbwcod[6], gainrng[2] */
}
......@@ -546,7 +546,7 @@ static int compute_bit_allocation(AC3EncodeContext *s,
/* sdcycod[2], fdcycod[2], sgaincod[2], dbpbcod[2], floorcod[3] */
/* csnroffset[6] */
/* (fsnoffset[4] + fgaincod[4]) * c */
frame_bits += 2*4 + 3 + 6 + s->nb_all_channels * (4 + 3);
frame_bits += 2*4 + 3 + 6 + s->channels * (4 + 3);
/* auxdatae, crcrsv */
frame_bits += 2;
......@@ -595,14 +595,14 @@ static int compute_bit_allocation(AC3EncodeContext *s,
}
s->coarse_snr_offset = coarse_snr_offset;
for(ch=0;ch<s->nb_all_channels;ch++)
for(ch=0;ch<s->channels;ch++)
s->fine_snr_offset[ch] = fine_snr_offset;
#if defined(DEBUG_BITALLOC)
{
int j;
for(i=0;i<6;i++) {
for(ch=0;ch<s->nb_all_channels;ch++) {
for(ch=0;ch<s->channels;ch++) {
printf("Block #%d Ch%d:\n", i, ch);
printf("bap=");
for(j=0;j<s->nb_coefs[ch];j++) {
......@@ -631,11 +631,11 @@ static av_cold int set_channel_info(AC3EncodeContext *s, int channels,
if (av_get_channel_layout_nb_channels(ch_layout) != channels)
return -1;
s->lfe = !!(ch_layout & AV_CH_LOW_FREQUENCY);
s->nb_all_channels = channels;
s->nb_channels = channels - s->lfe;
s->lfe_channel = s->lfe ? s->nb_channels : -1;
if (s->lfe)
s->lfe_on = !!(ch_layout & AV_CH_LOW_FREQUENCY);
s->channels = channels;
s->fbw_channels = channels - s->lfe_on;
s->lfe_channel = s->lfe_on ? s->fbw_channels : -1;
if (s->lfe_on)
ch_layout -= AV_CH_LOW_FREQUENCY;
switch (ch_layout) {
......@@ -652,9 +652,9 @@ static av_cold int set_channel_info(AC3EncodeContext *s, int channels,
return -1;
}
s->channel_map = ff_ac3_enc_channel_map[s->channel_mode][s->lfe];
s->channel_map = ff_ac3_enc_channel_map[s->channel_mode][s->lfe_on];
*channel_layout = ch_layout;
if (s->lfe)
if (s->lfe_on)
*channel_layout |= AV_CH_LOW_FREQUENCY;
return 0;
......@@ -723,12 +723,12 @@ static av_cold int AC3_encode_init(AVCodecContext *avctx)
size, so that we avoid annoying high frequency artifacts */
bw_code = 50;
}
for(ch=0;ch<s->nb_channels;ch++) {
for(ch=0;ch<s->fbw_channels;ch++) {
/* bandwidth for each channel */
s->chbwcod[ch] = bw_code;
s->bandwidth_code[ch] = bw_code;
s->nb_coefs[ch] = bw_code * 3 + 73;
}
if (s->lfe) {
if (s->lfe_on) {
s->nb_coefs[s->lfe_channel] = 7; /* fixed */
}
/* initial snr offset */
......@@ -766,7 +766,7 @@ static void output_frame_header(AC3EncodeContext *s, unsigned char *frame)
put_bits(&s->pb, 2, 1); /* XXX -6 dB */
if (s->channel_mode == AC3_CHMODE_STEREO)
put_bits(&s->pb, 2, 0); /* surround not indicated */
put_bits(&s->pb, 1, s->lfe); /* LFE */
put_bits(&s->pb, 1, s->lfe_on); /* LFE */
put_bits(&s->pb, 5, 31); /* dialog norm: -31 db */
put_bits(&s->pb, 1, 0); /* no compression control word */
put_bits(&s->pb, 1, 0); /* no lang code */
......@@ -833,9 +833,9 @@ static void output_audio_block(AC3EncodeContext *s,
uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr;
int delta0, delta1, delta2;
for(ch=0;ch<s->nb_channels;ch++)
for(ch=0;ch<s->fbw_channels;ch++)
put_bits(&s->pb, 1, 0); /* 512 point MDCT */
for(ch=0;ch<s->nb_channels;ch++)
for(ch=0;ch<s->fbw_channels;ch++)
put_bits(&s->pb, 1, 1); /* no dither */
put_bits(&s->pb, 1, 0); /* no dynamic range */
if (block_num == 0) {
......@@ -872,21 +872,21 @@ static void output_audio_block(AC3EncodeContext *s,
}
#endif
/* exponent strategy */
for(ch=0;ch<s->nb_channels;ch++) {
for(ch=0;ch<s->fbw_channels;ch++) {
put_bits(&s->pb, 2, exp_strategy[ch]);
}
if (s->lfe) {
if (s->lfe_on) {
put_bits(&s->pb, 1, exp_strategy[s->lfe_channel]);
}
for(ch=0;ch<s->nb_channels;ch++) {
for(ch=0;ch<s->fbw_channels;ch++) {
if (exp_strategy[ch] != EXP_REUSE)
put_bits(&s->pb, 6, s->chbwcod[ch]);
put_bits(&s->pb, 6, s->bandwidth_code[ch]);
}
/* exponents */
for (ch = 0; ch < s->nb_all_channels; ch++) {
for (ch = 0; ch < s->channels; ch++) {
switch(exp_strategy[ch]) {
case EXP_REUSE:
continue;
......@@ -948,7 +948,7 @@ static void output_audio_block(AC3EncodeContext *s,
put_bits(&s->pb, 1, baie); /* always present with bai */
if (baie) {
put_bits(&s->pb, 6, s->coarse_snr_offset);
for(ch=0;ch<s->nb_all_channels;ch++) {
for(ch=0;ch<s->channels;ch++) {
put_bits(&s->pb, 4, s->fine_snr_offset[ch]);
put_bits(&s->pb, 3, s->fast_gain_code[ch]);
}
......@@ -965,7 +965,7 @@ static void output_audio_block(AC3EncodeContext *s,
mant1_cnt = mant2_cnt = mant4_cnt = 0;
qmant1_ptr = qmant2_ptr = qmant4_ptr = NULL;
for (ch = 0; ch < s->nb_all_channels; ch++) {
for (ch = 0; ch < s->channels; ch++) {
int b, c, e, v;
for(i=0;i<s->nb_coefs[ch];i++) {
......@@ -1052,7 +1052,7 @@ static void output_audio_block(AC3EncodeContext *s,
}
/* second pass : output the values */
for (ch = 0; ch < s->nb_all_channels; ch++) {
for (ch = 0; ch < s->channels; ch++) {
int b, q;
for(i=0;i<s->nb_coefs[ch];i++) {
......@@ -1201,7 +1201,7 @@ static int AC3_encode_frame(AVCodecContext *avctx,
int frame_bits;
frame_bits = 0;
for(ch=0;ch<s->nb_all_channels;ch++) {
for(ch=0;ch<s->channels;ch++) {
int ich = s->channel_map[ch];
/* fixed mdct to the six sub blocks & exponent computation */
for(i=0;i<NB_BLOCKS;i++) {
......@@ -1210,7 +1210,7 @@ static int AC3_encode_frame(AVCodecContext *avctx,
/* compute input samples */
memcpy(input_samples, s->last_samples[ich], N/2 * sizeof(int16_t));
sinc = s->nb_all_channels;
sinc = s->channels;
sptr = samples + (sinc * (N/2) * i) + ich;
for(j=0;j<N/2;j++) {
v = *sptr;
......
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