#include "libavutil/error.h"
#include "dca.h"
+#include "dca_core.h"
#include "dca_syncwords.h"
+#include "get_bits.h"
#include "put_bits.h"
const uint32_t avpriv_dca_sample_rates[16] = {
0, 1, 2, 3, 4, 1, 2, 3, 4, 4, 0, 1, 2, 3, 4, 4
};
+const uint8_t ff_dca_bits_per_sample[8] = {
+ 16, 16, 20, 20, 0, 24, 24, 0
+};
+
int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
int max_size)
{
return AVERROR_INVALIDDATA;
}
}
+
+int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb)
+{
+ if (get_bits_long(gb, 32) != DCA_SYNCWORD_CORE_BE)
+ return DCA_PARSE_ERROR_SYNC_WORD;
+
+ h->normal_frame = get_bits1(gb);
+ h->deficit_samples = get_bits(gb, 5) + 1;
+ if (h->deficit_samples != DCA_PCMBLOCK_SAMPLES)
+ return DCA_PARSE_ERROR_DEFICIT_SAMPLES;
+
+ h->crc_present = get_bits1(gb);
+ h->npcmblocks = get_bits(gb, 7) + 1;
+ if (h->npcmblocks & (DCA_SUBBAND_SAMPLES - 1))
+ return DCA_PARSE_ERROR_PCM_BLOCKS;
+
+ h->frame_size = get_bits(gb, 14) + 1;
+ if (h->frame_size < 96)
+ return DCA_PARSE_ERROR_FRAME_SIZE;
+
+ h->audio_mode = get_bits(gb, 6);
+ if (h->audio_mode >= DCA_AMODE_COUNT)
+ return DCA_PARSE_ERROR_AMODE;
+
+ h->sr_code = get_bits(gb, 4);
+ if (!avpriv_dca_sample_rates[h->sr_code])
+ return DCA_PARSE_ERROR_SAMPLE_RATE;
+
+ h->br_code = get_bits(gb, 5);
+ if (get_bits1(gb))
+ return DCA_PARSE_ERROR_RESERVED_BIT;
+
+ h->drc_present = get_bits1(gb);
+ h->ts_present = get_bits1(gb);
+ h->aux_present = get_bits1(gb);
+ h->hdcd_master = get_bits1(gb);
+ h->ext_audio_type = get_bits(gb, 3);
+ h->ext_audio_present = get_bits1(gb);
+ h->sync_ssf = get_bits1(gb);
+ h->lfe_present = get_bits(gb, 2);
+ if (h->lfe_present == DCA_LFE_FLAG_INVALID)
+ return DCA_PARSE_ERROR_LFE_FLAG;
+
+ h->predictor_history = get_bits1(gb);
+ if (h->crc_present)
+ skip_bits(gb, 16);
+ h->filter_perfect = get_bits1(gb);
+ h->encoder_rev = get_bits(gb, 4);
+ h->copy_hist = get_bits(gb, 2);
+ h->pcmr_code = get_bits(gb, 3);
+ if (!ff_dca_bits_per_sample[h->pcmr_code])
+ return DCA_PARSE_ERROR_PCM_RES;
+
+ h->sumdiff_front = get_bits1(gb);
+ h->sumdiff_surround = get_bits1(gb);
+ h->dn_code = get_bits(gb, 4);
+ return 0;
+}
+
+int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, uint8_t *buf, int size)
+{
+ GetBitContext gb;
+
+ if (init_get_bits8(&gb, buf, size) < 0)
+ return DCA_PARSE_ERROR_INVALIDDATA;
+
+ return ff_dca_parse_core_frame_header(h, &gb);
+}