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Remove duplicate AC3EncodeContext fields, sr_shift and sr_code.

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Originally committed as revision 25949 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2010-12-14 14:50:30 +00:00
parent 2d2692eb49
commit a657899cf7
1 changed files with 8 additions and 12 deletions
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20
libavcodec/ac3enc.c
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@ -41,8 +41,6 @@ typedef struct AC3EncodeContext {
int bit_rate;
int sample_rate;
int sr_shift;
int sr_code; /* frequency */
int frame_size_min; /* minimum frame size in case rounding is necessary */
int frame_size; /* current frame size in words */
@ -509,10 +507,8 @@ static int compute_bit_allocation(AC3EncodeContext *s,
s->fast_gain_code[ch] = 4;
/* compute real values */
s->bit_alloc.sr_code = s->sr_code;
s->bit_alloc.sr_shift = s->sr_shift;
s->bit_alloc.slow_decay = ff_ac3_slow_decay_tab[s->slow_decay_code] >> s->sr_shift;
s->bit_alloc.fast_decay = ff_ac3_fast_decay_tab[s->fast_decay_code] >> s->sr_shift;
s->bit_alloc.slow_decay = ff_ac3_slow_decay_tab[s->slow_decay_code] >> s->bit_alloc.sr_shift;
s->bit_alloc.fast_decay = ff_ac3_fast_decay_tab[s->fast_decay_code] >> s->bit_alloc.sr_shift;
s->bit_alloc.slow_gain = ff_ac3_slow_gain_tab[s->slow_gain_code];
s->bit_alloc.db_per_bit = ff_ac3_db_per_bit_tab[s->db_per_bit_code];
s->bit_alloc.floor = ff_ac3_floor_tab[s->floor_code];
@ -692,21 +688,21 @@ static av_cold int AC3_encode_init(AVCodecContext *avctx)
return -1;
found:
s->sample_rate = freq;
s->sr_shift = i;
s->sr_code = j;
s->bitstream_id = 8 + s->sr_shift;
s->bit_alloc.sr_shift = i;
s->bit_alloc.sr_code = j;
s->bitstream_id = 8 + s->bit_alloc.sr_shift;
s->bitstream_mode = 0; /* complete main audio service */
/* bitrate & frame size */
for(i=0;i<19;i++) {
if ((ff_ac3_bitrate_tab[i] >> s->sr_shift)*1000 == bitrate)
if ((ff_ac3_bitrate_tab[i] >> s->bit_alloc.sr_shift)*1000 == bitrate)
break;
}
if (i == 19)
return -1;
s->bit_rate = bitrate;
s->frame_size_code = i << 1;
s->frame_size_min = ff_ac3_frame_size_tab[s->frame_size_code][s->sr_code];
s->frame_size_min = ff_ac3_frame_size_tab[s->frame_size_code][s->bit_alloc.sr_code];
s->bits_written = 0;
s->samples_written = 0;
s->frame_size = s->frame_size_min;
@ -755,7 +751,7 @@ static void output_frame_header(AC3EncodeContext *s, unsigned char *frame)
put_bits(&s->pb, 16, 0x0b77); /* frame header */
put_bits(&s->pb, 16, 0); /* crc1: will be filled later */
put_bits(&s->pb, 2, s->sr_code);
put_bits(&s->pb, 2, s->bit_alloc.sr_code);
put_bits(&s->pb, 6, s->frame_size_code + (s->frame_size - s->frame_size_min));
put_bits(&s->pb, 5, s->bitstream_id);
put_bits(&s->pb, 3, s->bitstream_mode);