Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

cosmetics: rename some fields in AC3EncodeContext

Browse Source 
Originally committed as revision 25948 to svn://svn.ffmpeg.org/ffmpeg/trunk
oldabi
Justin Ruggles 14 years ago
parent 9cb5903299
commit 2d2692eb49
1 changed files with 37 additions and 37 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 74
      libavcodec/ac3enc.c

74
libavcodec/ac3enc.c
Unescape View File

@ -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;

Write Preview
Loading…
Cancel
Save