X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpegaudiodec.c;h=da34d8487887ec10f2abae7fad1dc6ab33222dc7;hb=e37f161e66e042d6c2c7470c4d9881df9427fc4a;hp=5cc3c74339d7d4537612bd907f15f9900da5f75e;hpb=964912aba56a29acf25c9e216255ea44190f419a;p=ffmpeg diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c index 5cc3c74339d..da34d848788 100644 --- a/libavcodec/mpegaudiodec.c +++ b/libavcodec/mpegaudiodec.c @@ -24,6 +24,8 @@ * MPEG Audio decoder */ +#define UNCHECKED_BITSTREAM_READER 1 + #include "libavutil/audioconvert.h" #include "avcodec.h" #include "get_bits.h" @@ -130,10 +132,6 @@ static uint16_t band_index_long[9][23]; static INTFLOAT is_table[2][16]; static INTFLOAT is_table_lsf[2][2][16]; static INTFLOAT csa_table[8][4]; -/** Window for MDCT. Note that only the component [0,17] and [20,37] are used, - the components 18 and 19 are there only to assure 128-bit alignment for asm - */ -DECLARE_ALIGNED(16, static INTFLOAT, mdct_win)[8][40]; static int16_t division_tab3[1<<6 ]; static int16_t division_tab5[1<<8 ]; @@ -420,45 +418,6 @@ static av_cold void decode_init_static(void) csa_table[i][3] = ca - cs; #endif } - - /* compute mdct windows */ - for (i = 0; i < 36; i++) { - for (j = 0; j < 4; j++) { - double d; - - if (j == 2 && i % 3 != 1) - continue; - - d = sin(M_PI * (i + 0.5) / 36.0); - if (j == 1) { - if (i >= 30) d = 0; - else if (i >= 24) d = sin(M_PI * (i - 18 + 0.5) / 12.0); - else if (i >= 18) d = 1; - } else if (j == 3) { - if (i < 6) d = 0; - else if (i < 12) d = sin(M_PI * (i - 6 + 0.5) / 12.0); - else if (i < 18) d = 1; - } - //merge last stage of imdct into the window coefficients - d *= 0.5 / cos(M_PI * (2 * i + 19) / 72); - - if (j == 2) - mdct_win[j][i/3] = FIXHR((d / (1<<5))); - else { - int idx = i < 18 ? i : i + 2; - mdct_win[j][idx] = FIXHR((d / (1<<5))); - } - } - } - - /* NOTE: we do frequency inversion adter the MDCT by changing - the sign of the right window coefs */ - for (j = 0; j < 4; j++) { - for (i = 0; i < 40; i += 2) { - mdct_win[j + 4][i ] = mdct_win[j][i ]; - mdct_win[j + 4][i + 1] = -mdct_win[j][i + 1]; - } - } } static av_cold int decode_init(AVCodecContext * avctx) @@ -1028,10 +987,10 @@ static int huffman_decode(MPADecodeContext *s, GranuleDef *g, /* skip extension bits */ bits_left = end_pos2 - get_bits_count(&s->gb); //av_log(NULL, AV_LOG_ERROR, "left:%d buf:%p\n", bits_left, s->in_gb.buffer); - if (bits_left < 0 && (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) { + if (bits_left < 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_COMPLIANT))) { av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); s_index=0; - } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE))) { + } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE))) { av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); s_index = 0; } @@ -1282,59 +1241,53 @@ static void compute_imdct(MPADecodeContext *s, GranuleDef *g, mdct_long_end = sblimit; } - buf = mdct_buf; - ptr = g->sb_hybrid; - for (j = 0; j < mdct_long_end; j++) { - int win_idx = (g->switch_point && j < 2) ? 0 : g->block_type; - /* apply window & overlap with previous buffer */ - out_ptr = sb_samples + j; - /* select window */ - win = mdct_win[win_idx + (4 & -(j & 1))]; - s->mpadsp.RENAME(imdct36)(out_ptr, buf, ptr, win); - out_ptr += 18 * SBLIMIT; - ptr += 18; - buf += 18; - } + s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid, + mdct_long_end, g->switch_point, + g->block_type); + + buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3); + ptr = g->sb_hybrid + 18 * mdct_long_end; + for (j = mdct_long_end; j < sblimit; j++) { /* select frequency inversion */ - win = mdct_win[2 + (4 & -(j & 1))]; + win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))]; out_ptr = sb_samples + j; for (i = 0; i < 6; i++) { - *out_ptr = buf[i]; + *out_ptr = buf[4*i]; out_ptr += SBLIMIT; } imdct12(out2, ptr + 0); for (i = 0; i < 6; i++) { - *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*1]; - buf[i + 6*2] = MULH3(out2[i + 6], win[i + 6], 1); + *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)]; + buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1); out_ptr += SBLIMIT; } imdct12(out2, ptr + 1); for (i = 0; i < 6; i++) { - *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*2]; - buf[i + 6*0] = MULH3(out2[i + 6], win[i + 6], 1); + *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)]; + buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1); out_ptr += SBLIMIT; } imdct12(out2, ptr + 2); for (i = 0; i < 6; i++) { - buf[i + 6*0] = MULH3(out2[i ], win[i ], 1) + buf[i + 6*0]; - buf[i + 6*1] = MULH3(out2[i + 6], win[i + 6], 1); - buf[i + 6*2] = 0; + buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)]; + buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1); + buf[4*(i + 6*2)] = 0; } ptr += 18; - buf += 18; + buf += (j&3) != 3 ? 1 : (4*18-3); } /* zero bands */ for (j = sblimit; j < SBLIMIT; j++) { /* overlap */ out_ptr = sb_samples + j; for (i = 0; i < 18; i++) { - *out_ptr = buf[i]; - buf[i] = 0; + *out_ptr = buf[4*i]; + buf[4*i] = 0; out_ptr += SBLIMIT; } - buf += 18; + buf += (j&3) != 3 ? 1 : (4*18-3); } } @@ -1425,15 +1378,21 @@ static int mp_decode_layer3(MPADecodeContext *s) } if (!s->adu_mode) { + int skip; const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb)>>3); assert((get_bits_count(&s->gb) & 7) == 0); /* now we get bits from the main_data_begin offset */ av_dlog(s->avctx, "seekback: %d\n", main_data_begin); //av_log(NULL, AV_LOG_ERROR, "backstep:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size); - memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES); + if (s->gb.size_in_bits > get_bits_count(&s->gb)) + memcpy(s->last_buf + s->last_buf_size, ptr, + FFMIN(EXTRABYTES, (s->gb.size_in_bits - get_bits_count(&s->gb))>>3)); s->in_gb = s->gb; init_get_bits(&s->gb, s->last_buf, s->last_buf_size*8); +#if !UNCHECKED_BITSTREAM_READER + s->gb.size_in_bits_plus8 += EXTRABYTES * 8; +#endif skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin)); } @@ -1768,11 +1727,6 @@ static int decode_frame_adu(AVCodecContext *avctx, void *data, s->frame_size = len; -#if FF_API_PARSE_FRAME - if (avctx->parse_only) - out_size = buf_size; - else -#endif out_size = mp_decode_frame(s, NULL, buf, buf_size); *got_frame_ptr = 1; @@ -2020,11 +1974,7 @@ AVCodec ff_mp1_decoder = { .priv_data_size = sizeof(MPADecodeContext), .init = decode_init, .decode = decode_frame, -#if FF_API_PARSE_FRAME - .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1, -#else .capabilities = CODEC_CAP_DR1, -#endif .flush = flush, .long_name = NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"), }; @@ -2037,11 +1987,7 @@ AVCodec ff_mp2_decoder = { .priv_data_size = sizeof(MPADecodeContext), .init = decode_init, .decode = decode_frame, -#if FF_API_PARSE_FRAME - .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1, -#else .capabilities = CODEC_CAP_DR1, -#endif .flush = flush, .long_name = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"), }; @@ -2054,11 +2000,7 @@ AVCodec ff_mp3_decoder = { .priv_data_size = sizeof(MPADecodeContext), .init = decode_init, .decode = decode_frame, -#if FF_API_PARSE_FRAME - .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1, -#else .capabilities = CODEC_CAP_DR1, -#endif .flush = flush, .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"), }; @@ -2071,11 +2013,7 @@ AVCodec ff_mp3adu_decoder = { .priv_data_size = sizeof(MPADecodeContext), .init = decode_init, .decode = decode_frame_adu, -#if FF_API_PARSE_FRAME - .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1, -#else .capabilities = CODEC_CAP_DR1, -#endif .flush = flush, .long_name = NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"), };