mirror of https://git.ffmpeg.org/ffmpeg.git
crc8 checking, based upon a patch by (Miroslav Lichvar <lichvarm at phoenix dot inf dot upol dot cz>)
less spam/av_log fix synccode search channel_order -> decorrelation_type (cosmetic i know, but the old name is too meaningless IMHO) faster mid/side decorrelator based upon lifting transforms Originally committed as revision 2793 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
parent
4fd125984b
commit
9d65611096
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@ -34,7 +34,7 @@
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#define MAX_CHANNELS 8
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#define MAX_BLOCKSIZE 65535
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enum channel_order {
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enum decorrelation_type {
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INDEPENDENT,
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LEFT_SIDE,
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RIGHT_SIDE,
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@ -50,7 +50,7 @@ typedef struct FLACContext {
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int samplerate, channels;
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int blocksize/*, last_blocksize*/;
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int bps, curr_bps;
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enum channel_order order;
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enum decorrelation_type decorrelation;
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int32_t *decoded[MAX_CHANNELS];
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uint8_t *bitstream;
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@ -69,6 +69,41 @@ static int sample_rate_table[] =
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static int sample_size_table[] =
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{ 0, 8, 12, 0, 16, 20, 24, 0 };
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static const uint8_t table_crc8[256] = {
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0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15,
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0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
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0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65,
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0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
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0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5,
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0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
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0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85,
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0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
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0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2,
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0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
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0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2,
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0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
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0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32,
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0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
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0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42,
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0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
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0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c,
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0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
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0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec,
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0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
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0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c,
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0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
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0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c,
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0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
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0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b,
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0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63,
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0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b,
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0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
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0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb,
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0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83,
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0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb,
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0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3
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};
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static int64_t get_utf8(GetBitContext *gb)
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{
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uint64_t val;
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@ -93,6 +128,17 @@ static int64_t get_utf8(GetBitContext *gb)
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return val;
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}
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static int get_crc8(uint8_t *buf, int count){
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int crc=0;
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int i;
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for(i=0; i<count; i++){
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crc = table_crc8[crc ^ buf[i]];
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}
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return crc;
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}
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static int flac_decode_init(AVCodecContext * avctx)
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{
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return 0;
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@ -199,10 +245,10 @@ static int decode_subframe_fixed(FLACContext *s, int channel, int pred_order)
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{
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int i;
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av_log(s->avctx, AV_LOG_DEBUG, " SUBFRAME FIXED\n");
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// av_log(s->avctx, AV_LOG_DEBUG, " SUBFRAME FIXED\n");
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/* warm up samples */
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av_log(s->avctx, AV_LOG_DEBUG, " warm up samples: %d\n", pred_order);
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// av_log(s->avctx, AV_LOG_DEBUG, " warm up samples: %d\n", pred_order);
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for (i = 0; i < pred_order; i++)
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{
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@ -270,10 +316,14 @@ static int decode_subframe_lpc(FLACContext *s, int channel, int pred_order)
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av_log(s->avctx, AV_LOG_DEBUG, "invalid coeff precision\n");
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return -1;
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}
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av_log(s->avctx, AV_LOG_DEBUG, " qlp coeff prec: %d\n", coeff_prec);
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// av_log(s->avctx, AV_LOG_DEBUG, " qlp coeff prec: %d\n", coeff_prec);
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qlevel = get_sbits(&s->gb, 5);
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av_log(s->avctx, AV_LOG_DEBUG, " quant level: %d\n", qlevel);
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assert(qlevel >= 0); //FIXME
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// av_log(s->avctx, AV_LOG_DEBUG, " quant level: %d\n", qlevel);
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if(qlevel < 0){
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av_log(s->avctx, AV_LOG_DEBUG, "qlevel %d not supported, maybe buggy stream\n", qlevel);
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return -1;
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}
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for (i = 0; i < pred_order; i++)
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{
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coeffs[i] = get_sbits(&s->gb, coeff_prec);
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@ -301,10 +351,10 @@ static inline int decode_subframe(FLACContext *s, int channel)
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s->curr_bps = s->bps;
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if(channel == 0){
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if(s->order == RIGHT_SIDE)
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if(s->decorrelation == RIGHT_SIDE)
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s->curr_bps++;
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}else{
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if(s->order == LEFT_SIDE || s->order == MID_SIDE)
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if(s->decorrelation == LEFT_SIDE || s->decorrelation == MID_SIDE)
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s->curr_bps++;
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}
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@ -354,7 +404,7 @@ static inline int decode_subframe(FLACContext *s, int channel)
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}
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else if ((type >= 8) && (type <= 12))
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{
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av_log(s->avctx, AV_LOG_DEBUG, "coding type: fixed\n");
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// av_log(s->avctx, AV_LOG_DEBUG, "coding type: fixed\n");
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if (decode_subframe_fixed(s, channel, type & ~0x8) < 0)
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return -1;
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}
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@ -382,7 +432,7 @@ static inline int decode_subframe(FLACContext *s, int channel)
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static int decode_frame(FLACContext *s)
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{
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int blocksize_code, sample_rate_code, sample_size_code, assignment, i;
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int blocksize_code, sample_rate_code, sample_size_code, assignment, i, crc8;
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blocksize_code = get_bits(&s->gb, 4);
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@ -391,25 +441,14 @@ static int decode_frame(FLACContext *s)
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assignment = get_bits(&s->gb, 4); /* channel assignment */
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if (assignment < 8)
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{
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s->order = INDEPENDENT;
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s->decorrelation = INDEPENDENT;
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if (s->channels != assignment+1)
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av_log(s->avctx, AV_LOG_DEBUG, "channel number and number of assigned channels differ!\n");
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av_log(s->avctx, AV_LOG_DEBUG, "channels: %d\n", assignment+1);
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// av_log(s->avctx, AV_LOG_DEBUG, "channels: %d\n", assignment+1);
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}
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else if (assignment == 8)
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else if (assignment < 11)
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{
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s->order = LEFT_SIDE;
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av_log(s->avctx, AV_LOG_DEBUG, "left/side\n");
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}
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else if (assignment == 9)
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{
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s->order = RIGHT_SIDE;
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av_log(s->avctx, AV_LOG_DEBUG, "right/side\n");
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}
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else if (assignment == 10)
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{
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s->order = MID_SIDE;
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av_log(s->avctx, AV_LOG_DEBUG, "mid/side\n");
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s->decorrelation= LEFT_SIDE + assignment - 8;
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}
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else
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{
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@ -484,17 +523,18 @@ static int decode_frame(FLACContext *s)
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return -1;
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}
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skip_bits(&s->gb, 8); /* header crc */
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skip_bits(&s->gb, 8);
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crc8= get_crc8(s->gb.buffer, get_bits_count(&s->gb)/8);
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if(crc8){
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av_log(s->avctx, AV_LOG_ERROR, "header crc missmatch crc=%2X\n", crc8);
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return -1;
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}
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// dump_headers(s);
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/* subframes */
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for (i = 0; i < s->channels; i++)
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{
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/* if (s->blocksize != s->last_blocksize)
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{
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s->decoded[i] = av_realloc(s->decoded[i], sizeof(uint32_t)*s->blocksize);
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}*/
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// av_log(s->avctx, AV_LOG_DEBUG, "decoded: %x residual: %x\n", s->decoded[i], s->residual[i]);
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if (decode_subframe(s, i) < 0)
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return -1;
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@ -566,9 +606,6 @@ static int flac_decode_frame(AVCodecContext *avctx,
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switch(metadata_type)
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{
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case METADATA_TYPE_STREAMINFO:
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if(metadata_size == 0)
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av_log(s->avctx, AV_LOG_DEBUG, "size= 0 WTF!?\n");
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metadata_streaminfo(s);
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dump_headers(s);
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break;
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@ -582,7 +619,7 @@ static int flac_decode_frame(AVCodecContext *avctx,
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else
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{
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tmp = show_bits(&s->gb, 16);
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tmp = show_bits(&s->gb, 16);
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if(tmp != 0xFFF8){
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av_log(s->avctx, AV_LOG_ERROR, "FRAME HEADER not here\n");
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while(get_bits_count(&s->gb)/8+2 < buf_size && show_bits(&s->gb, 16) != 0xFFF8)
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@ -590,8 +627,12 @@ static int flac_decode_frame(AVCodecContext *avctx,
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goto end; // we may not have enough bits left to decode a frame, so try next time
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}
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skip_bits(&s->gb, 16);
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if (decode_frame(s) < 0)
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if (decode_frame(s) < 0){
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av_log(s->avctx, AV_LOG_ERROR, "decode_frame() failed\n");
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s->bitstream_size=0;
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s->bitstream_index=0;
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return -1;
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}
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}
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@ -637,7 +678,7 @@ static int flac_decode_frame(AVCodecContext *avctx,
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}
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}
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#else
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switch(s->order)
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switch(s->decorrelation)
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{
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case INDEPENDENT:
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for (j = 0; j < s->blocksize; j++)
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@ -669,25 +710,34 @@ static int flac_decode_frame(AVCodecContext *avctx,
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int mid, side;
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mid = s->decoded[0][i];
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side = s->decoded[1][i];
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#if 1 //needs to be checked but IMHO it should be binary identical
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mid -= side>>1;
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*(samples++) = mid + side;
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*(samples++) = mid;
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#else
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mid <<= 1;
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if (side & 1)
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mid++;
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*(samples++) = (mid + side) >> 1;
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*(samples++) = (mid - side) >> 1;
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#endif
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}
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break;
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}
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#endif
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*data_size = (int8_t *)samples - (int8_t *)data;
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av_log(s->avctx, AV_LOG_DEBUG, "data size: %d\n", *data_size);
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// av_log(s->avctx, AV_LOG_DEBUG, "data size: %d\n", *data_size);
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// s->last_blocksize = s->blocksize;
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end:
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i= (get_bits_count(&s->gb)+7)/8;;
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if(i > buf_size){
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av_log(s->avctx, AV_LOG_ERROR, "overread: %d\n", i - buf_size);
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s->bitstream_size=0;
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s->bitstream_index=0;
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return -1;
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}
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