return AC3_PARSE_ERROR_BSID;
if(hdr->bitstream_id <= 10) {
- /* Normal AC-3 */
- hdr->crc1 = get_bits(&gbc, 16);
- hdr->sr_code = get_bits(&gbc, 2);
- if(hdr->sr_code == 3)
- return AC3_PARSE_ERROR_SAMPLE_RATE;
-
- frame_size_code = get_bits(&gbc, 6);
- if(frame_size_code > 37)
- return AC3_PARSE_ERROR_FRAME_SIZE;
-
- skip_bits(&gbc, 5); // skip bsid, already got it
-
- skip_bits(&gbc, 3); // skip bitstream mode
- hdr->channel_mode = get_bits(&gbc, 3);
- if((hdr->channel_mode & 1) && hdr->channel_mode != AC3_CHMODE_MONO) {
- skip_bits(&gbc, 2); // skip center mix level
- }
- if(hdr->channel_mode & 4) {
- skip_bits(&gbc, 2); // skip surround mix level
- }
- if(hdr->channel_mode == AC3_CHMODE_STEREO) {
- skip_bits(&gbc, 2); // skip dolby surround mode
- }
- hdr->lfe_on = get_bits1(&gbc);
+ /* Normal AC-3 */
+ hdr->crc1 = get_bits(&gbc, 16);
+ hdr->sr_code = get_bits(&gbc, 2);
+ if(hdr->sr_code == 3)
+ return AC3_PARSE_ERROR_SAMPLE_RATE;
+
+ frame_size_code = get_bits(&gbc, 6);
+ if(frame_size_code > 37)
+ return AC3_PARSE_ERROR_FRAME_SIZE;
+
+ skip_bits(&gbc, 5); // skip bsid, already got it
- hdr->sr_shift = FFMAX(hdr->bitstream_id, 8) - 8;
- hdr->sample_rate = ff_ac3_sample_rate_tab[hdr->sr_code] >> hdr->sr_shift;
- hdr->bit_rate = (ff_ac3_bitrate_tab[frame_size_code>>1] * 1000) >> hdr->sr_shift;
- hdr->channels = ff_ac3_channels_tab[hdr->channel_mode] + hdr->lfe_on;
- hdr->frame_size = ff_ac3_frame_size_tab[frame_size_code][hdr->sr_code] * 2;
+ skip_bits(&gbc, 3); // skip bitstream mode
+ hdr->channel_mode = get_bits(&gbc, 3);
+ if((hdr->channel_mode & 1) && hdr->channel_mode != AC3_CHMODE_MONO) {
+ skip_bits(&gbc, 2); // skip center mix level
+ }
+ if(hdr->channel_mode & 4) {
+ skip_bits(&gbc, 2); // skip surround mix level
+ }
+ if(hdr->channel_mode == AC3_CHMODE_STEREO) {
+ skip_bits(&gbc, 2); // skip dolby surround mode
+ }
+ hdr->lfe_on = get_bits1(&gbc);
+
+ hdr->sr_shift = FFMAX(hdr->bitstream_id, 8) - 8;
+ hdr->sample_rate = ff_ac3_sample_rate_tab[hdr->sr_code] >> hdr->sr_shift;
+ hdr->bit_rate = (ff_ac3_bitrate_tab[frame_size_code>>1] * 1000) >> hdr->sr_shift;
+ hdr->channels = ff_ac3_channels_tab[hdr->channel_mode] + hdr->lfe_on;
+ hdr->frame_size = ff_ac3_frame_size_tab[frame_size_code][hdr->sr_code] * 2;
} else {
/* Enhanced AC-3 */
hdr->crc1 = 0;
if(err < 0)
return 0;
- *sample_rate = hdr.sample_rate;
- *bit_rate = hdr.bit_rate;
- *channels = hdr.channels;
- *samples = AC3_FRAME_SIZE;
- return hdr.frame_size;
+ *sample_rate = hdr.sample_rate;
+ *bit_rate = hdr.bit_rate;
+ *channels = hdr.channels;
+ *samples = AC3_FRAME_SIZE;
+ return hdr.frame_size;
}
static int ac3_parse_init(AVCodecParserContext *s1)