diff options
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/wavpack.c | 178 |
1 files changed, 160 insertions, 18 deletions
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c index b89723e2f2..c1558f1c6b 100644 --- a/libavcodec/wavpack.c +++ b/libavcodec/wavpack.c @@ -28,9 +28,15 @@ * WavPack lossless audio decoder */ +#define WV_MONO 0x00000004 #define WV_JOINT_STEREO 0x00000010 #define WV_FALSE_STEREO 0x40000000 +#define WV_HYBRID_MODE 0x00000008 +#define WV_HYBRID_SHAPE 0x00000008 +#define WV_HYBRID_BITRATE 0x00000200 +#define WV_HYBRID_BALANCE 0x00000400 + enum WP_ID_Flags{ WP_IDF_MASK = 0x1F, WP_IDF_IGNORE = 0x20, @@ -66,19 +72,27 @@ typedef struct Decorr { int samplesB[8]; } Decorr; +typedef struct WvChannel { + int median[3]; + int slow_level, error_limit; + int bitrate_acc, bitrate_delta; +} WvChannel; + typedef struct WavpackContext { AVCodecContext *avctx; + int frame_flags; int stereo, stereo_in; int joint; uint32_t CRC; GetBitContext gb; int data_size; // in bits int samples; - int median[6]; int terms; Decorr decorr[MAX_TERMS]; int zero, one, zeroes; int and, or, shift; + int hybrid, hybrid_bitrate; + WvChannel ch[2]; } WavpackContext; // exponent table copied from WavPack source @@ -101,6 +115,25 @@ static const uint8_t wp_exp2_table [256] = { 0xea, 0xec, 0xed, 0xee, 0xf0, 0xf1, 0xf2, 0xf4, 0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfc, 0xfd, 0xff }; +static const uint8_t wp_log2_table [] = { + 0x00, 0x01, 0x03, 0x04, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x10, 0x11, 0x12, 0x14, 0x15, + 0x16, 0x18, 0x19, 0x1a, 0x1c, 0x1d, 0x1e, 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2a, + 0x2c, 0x2d, 0x2e, 0x2f, 0x31, 0x32, 0x33, 0x34, 0x36, 0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3d, 0x3e, + 0x3f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4d, 0x4e, 0x4f, 0x50, 0x51, + 0x52, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, + 0x64, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x74, 0x75, + 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, + 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, + 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, + 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb2, + 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc0, + 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcb, 0xcc, 0xcd, 0xce, + 0xcf, 0xd0, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd8, 0xd9, 0xda, 0xdb, + 0xdc, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe4, 0xe5, 0xe6, 0xe7, 0xe7, + 0xe8, 0xe9, 0xea, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xee, 0xef, 0xf0, 0xf1, 0xf1, 0xf2, 0xf3, 0xf4, + 0xf4, 0xf5, 0xf6, 0xf7, 0xf7, 0xf8, 0xf9, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xff, 0xff +}; + static av_always_inline int wp_exp2(int16_t val) { int res, neg = 0; @@ -116,10 +149,28 @@ static av_always_inline int wp_exp2(int16_t val) return neg ? -res : res; } +static av_always_inline int wp_log2(int32_t val) +{ + int bits; + + if(!val) + return 0; + if(val == 1) + return 256; + val += val >> 9; + bits = av_log2(val) + 1; + if(bits < 9) + return (bits << 8) + wp_log2_table[(val << (9 - bits)) & 0xFF]; + else + return (bits << 8) + wp_log2_table[(val >> (bits - 9)) & 0xFF]; +} + +#define LEVEL_DECAY(a) ((a + 0x80) >> 8) + // macros for manipulating median values -#define GET_MED(n) ((median[n] >> 4) + 1) -#define DEC_MED(n) median[n] -= ((median[n] + (128>>n) - 2) / (128>>n)) * 2 -#define INC_MED(n) median[n] += ((median[n] + (128>>n)) / (128>>n)) * 5 +#define GET_MED(n) ((c->median[n] >> 4) + 1) +#define DEC_MED(n) c->median[n] -= ((c->median[n] + (128>>n) - 2) / (128>>n)) * 2 +#define INC_MED(n) c->median[n] += ((c->median[n] + (128>>n)) / (128>>n)) * 5 // macros for applying weight #define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \ @@ -148,24 +199,63 @@ static av_always_inline int get_tail(GetBitContext *gb, int k) return res; } -static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int *median, int *last) +static void update_error_limit(WavpackContext *ctx) +{ + int i, br[2], sl[2]; + + for(i = 0; i <= ctx->stereo_in; i++){ + ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; + br[i] = ctx->ch[i].bitrate_acc >> 16; + sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); + } + if(ctx->stereo_in && ctx->hybrid_bitrate){ + int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; + if(balance > br[0]){ + br[1] = br[0] << 1; + br[0] = 0; + }else if(-balance > br[0]){ + br[0] <<= 1; + br[1] = 0; + }else{ + br[1] = br[0] + balance; + br[0] = br[0] - balance; + } + } + for(i = 0; i <= ctx->stereo_in; i++){ + if(ctx->hybrid_bitrate){ + if(sl[i] - br[i] > -0x100) + ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); + else + ctx->ch[i].error_limit = 0; + }else{ + ctx->ch[i].error_limit = wp_exp2(br[i]); + } + } +} + +static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int channel, int *last) { int t, t2; int sign, base, add, ret; + WvChannel *c = &ctx->ch[channel]; *last = 0; - if((ctx->median[0] < 2U) && (ctx->median[3] < 2U) && !ctx->zero && !ctx->one){ + if((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) && !ctx->zero && !ctx->one){ if(ctx->zeroes){ ctx->zeroes--; - if(ctx->zeroes) + if(ctx->zeroes){ + c->slow_level -= LEVEL_DECAY(c->slow_level); return 0; + } }else{ t = get_unary_0_33(gb); if(t >= 2) t = get_bits(gb, t - 1) | (1 << (t-1)); ctx->zeroes = t; if(ctx->zeroes){ - memset(ctx->median, 0, sizeof(ctx->median)); + memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median)); + memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median)); + c->slow_level -= LEVEL_DECAY(c->slow_level); return 0; } } @@ -201,6 +291,9 @@ static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int *median, int ctx->zero = !ctx->one; } + if(ctx->hybrid && !channel) + update_error_limit(ctx); + if(!t){ base = 0; add = GET_MED(0) - 1; @@ -223,8 +316,23 @@ static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int *median, int INC_MED(1); INC_MED(2); } - ret = base + get_tail(gb, add); + if(!c->error_limit){ + ret = base + get_tail(gb, add); + }else{ + int mid = (base*2 + add + 1) >> 1; + while(add > c->error_limit){ + if(get_bits1(gb)){ + add -= (mid - base); + base = mid; + }else + add = mid - base - 1; + mid = (base*2 + add + 1) >> 1; + } + ret = mid; + } sign = get_bits1(gb); + if(ctx->hybrid_bitrate) + c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level); return sign ? ~ret : ret; } @@ -238,9 +346,9 @@ static int wv_unpack_stereo(WavpackContext *s, GetBitContext *gb, int16_t *dst) s->one = s->zero = s->zeroes = 0; do{ - L = wv_get_value(s, gb, s->median, &last); + L = wv_get_value(s, gb, 0, &last); if(last) break; - R = wv_get_value(s, gb, s->median + 3, &last); + R = wv_get_value(s, gb, 1, &last); if(last) break; for(i = 0; i < s->terms; i++){ t = s->decorr[i].value; @@ -320,7 +428,7 @@ static int wv_unpack_mono(WavpackContext *s, GetBitContext *gb, int16_t *dst) s->one = s->zero = s->zeroes = 0; do{ - T = wv_get_value(s, gb, s->median, &last); + T = wv_get_value(s, gb, 0, &last); S = 0; if(last) break; for(i = 0; i < s->terms; i++){ @@ -374,6 +482,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx, int16_t *samples = data; int samplecount; int got_terms = 0, got_weights = 0, got_samples = 0, got_entropy = 0, got_bs = 0; + int got_hybrid = 0; const uint8_t* buf_end = buf + buf_size; int i, j, id, size, ssize, weights, t; @@ -383,7 +492,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx, } memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr)); - memset(s->median, 0, sizeof(s->median)); + memset(s->ch, 0, sizeof(s->ch)); s->and = s->or = s->shift = 0; s->samples = AV_RL32(buf); buf += 4; @@ -396,8 +505,11 @@ static int wavpack_decode_frame(AVCodecContext *avctx, av_log(avctx, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n"); return -1; } - s->stereo_in = (AV_RL32(buf) & WV_FALSE_STEREO) ? 0 : s->stereo; - s->joint = AV_RL32(buf) & WV_JOINT_STEREO; buf += 4; + s->frame_flags = AV_RL32(buf); buf += 4; + s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo; + s->joint = s->frame_flags & WV_JOINT_STEREO; + s->hybrid = s->frame_flags & WV_HYBRID_MODE; + s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; s->CRC = AV_RL32(buf); buf += 4; // parse metadata blocks while(buf < buf_end){ @@ -500,12 +612,38 @@ static int wavpack_decode_frame(AVCodecContext *avctx, buf += ssize; continue; } - for(i = 0; i < 3 * (s->stereo_in + 1); i++){ - s->median[i] = wp_exp2(AV_RL16(buf)); - buf += 2; + for(j = 0; j <= s->stereo_in; j++){ + for(i = 0; i < 3; i++){ + s->ch[j].median[i] = wp_exp2(AV_RL16(buf)); + buf += 2; + } } got_entropy = 1; break; + case WP_ID_HYBRID: + if(s->hybrid_bitrate){ + for(i = 0; i <= s->stereo_in; i++){ + s->ch[i].slow_level = wp_exp2(AV_RL16(buf)); + buf += 2; + size -= 2; + } + } + for(i = 0; i < (s->stereo_in + 1); i++){ + s->ch[i].bitrate_acc = AV_RL16(buf) << 16; + buf += 2; + size -= 2; + } + if(size > 0){ + for(i = 0; i < (s->stereo_in + 1); i++){ + s->ch[i].bitrate_delta = wp_exp2((int16_t)AV_RL16(buf)); + buf += 2; + } + }else{ + for(i = 0; i < (s->stereo_in + 1); i++) + s->ch[i].bitrate_delta = 0; + } + got_hybrid = 1; + break; case WP_ID_INT32INFO: if(size != 4 || *buf){ av_log(avctx, AV_LOG_ERROR, "Invalid INT32INFO, size = %i, sent_bits = %i\n", size, *buf); @@ -550,6 +688,10 @@ static int wavpack_decode_frame(AVCodecContext *avctx, av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); return -1; } + if(s->hybrid && !got_hybrid){ + av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); + return -1; + } if(!got_bs){ av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); return -1; |