diff options
Diffstat (limited to 'libavcodec/mpegaudiodec_template.c')
-rw-r--r-- | libavcodec/mpegaudiodec_template.c | 136 |
1 files changed, 94 insertions, 42 deletions
diff --git a/libavcodec/mpegaudiodec_template.c b/libavcodec/mpegaudiodec_template.c index e9c7850..138a107 100644 --- a/libavcodec/mpegaudiodec_template.c +++ b/libavcodec/mpegaudiodec_template.c @@ -2,20 +2,20 @@ * MPEG Audio decoder * Copyright (c) 2001, 2002 Fabrice Bellard * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -28,6 +28,7 @@ #include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/float_dsp.h" +#include "libavutil/libm.h" #include "avcodec.h" #include "get_bits.h" #include "internal.h" @@ -84,7 +85,7 @@ typedef struct MPADecodeContext { int err_recognition; AVCodecContext* avctx; MPADSPContext mpadsp; - AVFloatDSPContext fdsp; + AVFloatDSPContext *fdsp; AVFrame *frame; } MPADecodeContext; @@ -184,6 +185,8 @@ static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g) { if (g->block_type == 2) { if (g->switch_point) { + if(s->sample_rate_index == 8) + avpriv_request_sample(s->avctx, "switch point in 8khz"); /* if switched mode, we handle the 36 first samples as long blocks. For 8000Hz, we handle the 72 first exponents as long blocks */ @@ -213,7 +216,7 @@ static inline int l1_unscale(int n, int mant, int scale_factor) shift = scale_factor_modshift[scale_factor]; mod = shift & 3; shift >>= 2; - val = MUL64(mant + (-1 << n) + 1, scale_factor_mult[n-1][mod]); + val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod]); shift += n; /* NOTE: at this point, 1 <= shift >= 21 + 15 */ return (int)((val + (1LL << (shift - 1))) >> shift); @@ -243,7 +246,10 @@ static inline int l3_unscale(int value, int exponent) e = table_4_3_exp [4 * value + (exponent & 3)]; m = table_4_3_value[4 * value + (exponent & 3)]; e -= exponent >> 2; - assert(e >= 1); +#ifdef DEBUG + if(e < 1) + av_log(NULL, AV_LOG_WARNING, "l3_unscale: e is %d\n", e); +#endif if (e > 31) return 0; m = (m + (1 << (e - 1))) >> e; @@ -307,7 +313,7 @@ static av_cold void decode_init_static(void) INIT_VLC_USE_NEW_STATIC); offset += huff_vlc_tables_sizes[i]; } - assert(offset == FF_ARRAY_ELEMS(huff_vlc_tables)); + av_assert0(offset == FF_ARRAY_ELEMS(huff_vlc_tables)); offset = 0; for (i = 0; i < 2; i++) { @@ -318,7 +324,7 @@ static av_cold void decode_init_static(void) INIT_VLC_USE_NEW_STATIC); offset += huff_quad_vlc_tables_sizes[i]; } - assert(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables)); + av_assert0(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables)); for (i = 0; i < 9; i++) { k = 0; @@ -371,7 +377,7 @@ static av_cold void decode_init_static(void) for (j = 0; j < 2; j++) { e = -(j + 1) * ((i + 1) >> 1); - f = pow(2.0, e / 4.0); + f = exp2(e / 4.0); k = i & 1; is_table_lsf[j][k ^ 1][i] = FIXR(f); is_table_lsf[j][k ][i] = FIXR(1.0); @@ -386,7 +392,7 @@ static av_cold void decode_init_static(void) ci = ci_table[i]; cs = 1.0 / sqrt(1.0 + ci * ci); ca = cs * ci; -#if !CONFIG_FLOAT +#if !USE_FLOATS csa_table[i][0] = FIXHR(cs/4); csa_table[i][1] = FIXHR(ca/4); csa_table[i][2] = FIXHR(ca/4) + FIXHR(cs/4); @@ -400,6 +406,16 @@ static av_cold void decode_init_static(void) } } +#if USE_FLOATS +static av_cold int decode_close(AVCodecContext * avctx) +{ + MPADecodeContext *s = avctx->priv_data; + av_freep(&s->fdsp); + + return 0; +} +#endif + static av_cold int decode_init(AVCodecContext * avctx) { static int initialized_tables = 0; @@ -412,7 +428,12 @@ static av_cold int decode_init(AVCodecContext * avctx) s->avctx = avctx; - avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); +#if USE_FLOATS + s->fdsp = avpriv_float_dsp_alloc(avctx->flags & CODEC_FLAG_BITEXACT); + if (!s->fdsp) + return AVERROR(ENOMEM); +#endif + ff_mpadsp_init(&s->mpadsp); if (avctx->request_sample_fmt == OUT_FMT && @@ -808,7 +829,7 @@ static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, if (s->in_gb.buffer && *pos >= s->gb.size_in_bits) { s->gb = s->in_gb; s->in_gb.buffer = NULL; - assert((get_bits_count(&s->gb) & 7) == 0); + av_assert2((get_bits_count(&s->gb) & 7) == 0); skip_bits_long(&s->gb, *pos - *end_pos); *end_pos2 = *end_pos = *end_pos2 + get_bits_count(&s->gb) - *pos; @@ -822,7 +843,7 @@ static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, v = -v; *dst = v; */ -#if CONFIG_FLOAT +#if USE_FLOATS #define READ_FLIP_SIGN(dst,src) \ v = AV_RN32A(src) ^ (get_bits1(&s->gb) << 31); \ AV_WN32A(dst, v); @@ -937,7 +958,7 @@ static int huffman_decode(MPADecodeContext *s, GranuleDef *g, s_index -= 4; skip_bits_long(&s->gb, last_pos - pos); av_log(s->avctx, AV_LOG_INFO, "overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos); - if(s->err_recognition & AV_EF_BITSTREAM) + if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) s_index=0; break; } @@ -964,10 +985,10 @@ static int huffman_decode(MPADecodeContext *s, GranuleDef *g, } /* skip extension bits */ bits_left = end_pos2 - get_bits_count(&s->gb); - if (bits_left < 0 && (s->err_recognition & AV_EF_BUFFER)) { + 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_BUFFER)) { + } 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; } @@ -1131,8 +1152,8 @@ found2: /* ms stereo ONLY */ /* NOTE: the 1/sqrt(2) normalization factor is included in the global gain */ -#if CONFIG_FLOAT - s->fdsp.butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576); +#if USE_FLOATS + s->fdsp->butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576); #else tab0 = g0->sb_hybrid; tab1 = g1->sb_hybrid; @@ -1146,7 +1167,18 @@ found2: } } -#if CONFIG_FLOAT +#if USE_FLOATS +#if HAVE_MIPSFPU +# include "mips/compute_antialias_float.h" +#endif /* HAVE_MIPSFPU */ +#else +#if HAVE_MIPSDSPR1 +# include "mips/compute_antialias_fixed.h" +#endif /* HAVE_MIPSDSPR1 */ +#endif /* USE_FLOATS */ + +#ifndef compute_antialias +#if USE_FLOATS #define AA(j) do { \ float tmp0 = ptr[-1-j]; \ float tmp1 = ptr[ j]; \ @@ -1192,6 +1224,7 @@ static void compute_antialias(MPADecodeContext *s, GranuleDef *g) ptr += 18; } } +#endif /* compute_antialias */ static void compute_imdct(MPADecodeContext *s, GranuleDef *g, INTFLOAT *sb_samples, INTFLOAT *mdct_buf) @@ -1361,9 +1394,8 @@ 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); - int extrasize = av_clip(get_bits_left(&s->gb) >> 3, 0, - FFMAX(0, LAST_BUF_SIZE - s->last_buf_size)); - assert((get_bits_count(&s->gb) & 7) == 0); + int extrasize = av_clip(get_bits_left(&s->gb) >> 3, 0, EXTRABYTES); + av_assert1((get_bits_count(&s->gb) & 7) == 0); /* now we get bits from the main_data_begin offset */ av_dlog(s->avctx, "seekback:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size); @@ -1372,7 +1404,7 @@ static int mp_decode_layer3(MPADecodeContext *s) 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 += extrasize * 8; + s->gb.size_in_bits_plus8 += FFMAX(extrasize, LAST_BUF_SIZE - s->last_buf_size) * 8; #endif s->last_buf_size <<= 3; for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) { @@ -1554,9 +1586,6 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, default: nb_frames = mp_decode_layer3(s); - if (nb_frames < 0) - return nb_frames; - s->last_buf_size=0; if (s->in_gb.buffer) { align_get_bits(&s->gb); @@ -1571,7 +1600,7 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, } align_get_bits(&s->gb); - assert((get_bits_count(&s->gb) & 7) == 0); + av_assert1((get_bits_count(&s->gb) & 7) == 0); i = get_bits_left(&s->gb) >> 3; if (i < 0 || i > BACKSTEP_SIZE || nb_frames < 0) { @@ -1579,19 +1608,20 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, av_log(s->avctx, AV_LOG_ERROR, "invalid new backstep %d\n", i); i = FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE); } - assert(i <= buf_size - HEADER_SIZE && i >= 0); + av_assert1(i <= buf_size - HEADER_SIZE && i >= 0); memcpy(s->last_buf + s->last_buf_size, s->gb.buffer + buf_size - HEADER_SIZE - i, i); s->last_buf_size += i; } + if(nb_frames < 0) + return nb_frames; + /* get output buffer */ if (!samples) { - av_assert0(s->frame != NULL); + av_assert0(s->frame); s->frame->nb_samples = s->avctx->frame_size; - if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) { - av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) return ret; - } samples = (OUT_INT **)s->frame->extended_data; } @@ -1627,10 +1657,19 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *got_frame_ptr, uint32_t header; int ret; + while(buf_size && !*buf){ + buf++; + buf_size--; + } + if (buf_size < HEADER_SIZE) return AVERROR_INVALIDDATA; header = AV_RB32(buf); + if (header>>8 == AV_RB32("TAG")>>8) { + av_log(avctx, AV_LOG_DEBUG, "discarding ID3 tag\n"); + return buf_size; + } if (ff_mpa_check_header(header) < 0) { av_log(avctx, AV_LOG_ERROR, "Header missing\n"); return AVERROR_INVALIDDATA; @@ -1651,6 +1690,7 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *got_frame_ptr, av_log(avctx, AV_LOG_ERROR, "incomplete frame\n"); return AVERROR_INVALIDDATA; } else if (s->frame_size < buf_size) { + av_log(avctx, AV_LOG_DEBUG, "incorrect frame size - multiple frames in buffer?\n"); buf_size= s->frame_size; } @@ -1680,7 +1720,9 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *got_frame_ptr, static void mp_flush(MPADecodeContext *ctx) { memset(ctx->synth_buf, 0, sizeof(ctx->synth_buf)); + memset(ctx->mdct_buf, 0, sizeof(ctx->mdct_buf)); ctx->last_buf_size = 0; + ctx->dither_state = 0; } static void flush(AVCodecContext *avctx) @@ -1697,6 +1739,7 @@ static int decode_frame_adu(AVCodecContext *avctx, void *data, MPADecodeContext *s = avctx->priv_data; uint32_t header; int len, ret; + int av_unused out_size; len = buf_size; @@ -1791,7 +1834,7 @@ static av_cold int decode_close_mp3on4(AVCodecContext * avctx) int i; for (i = 0; i < s->frames; i++) - av_free(s->mp3decctx[i]); + av_freep(&s->mp3decctx[i]); return 0; } @@ -1885,10 +1928,8 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data, /* get output buffer */ frame->nb_samples = MPA_FRAME_SIZE; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; - } out_samples = (OUT_INT **)frame->extended_data; // Discard too short frames @@ -1902,7 +1943,7 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data, fsize = AV_RB16(buf) >> 4; fsize = FFMIN3(fsize, len, MPA_MAX_CODED_FRAME_SIZE); m = s->mp3decctx[fr]; - assert(m != NULL); + av_assert1(m); if (fsize < HEADER_SIZE) { av_log(avctx, AV_LOG_ERROR, "Frame size smaller than header size\n"); @@ -1910,8 +1951,10 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data, } header = (AV_RB32(buf) & 0x000fffff) | s->syncword; // patch header - if (ff_mpa_check_header(header) < 0) // Bad header, discard block - break; + if (ff_mpa_check_header(header) < 0) { + av_log(avctx, AV_LOG_ERROR, "Bad header, discard block\n"); + return AVERROR_INVALIDDATA; + } avpriv_mpegaudio_decode_header((MPADecodeHeader *)m, header); @@ -1927,8 +1970,13 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data, if (m->nb_channels > 1) outptr[1] = out_samples[s->coff[fr] + 1]; - if ((ret = mp_decode_frame(m, outptr, buf, fsize)) < 0) - return ret; + if ((ret = mp_decode_frame(m, outptr, buf, fsize)) < 0) { + av_log(avctx, AV_LOG_ERROR, "failed to decode channel %d\n", ch); + memset(outptr[0], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); + if (m->nb_channels > 1) + memset(outptr[1], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); + ret = m->nb_channels * MPA_FRAME_SIZE*sizeof(OUT_INT); + } out_size += ret; buf += fsize; @@ -1936,6 +1984,10 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data, avctx->bit_rate += m->bit_rate; } + if (ch != avctx->channels) { + av_log(avctx, AV_LOG_ERROR, "failed to decode all channels\n"); + return AVERROR_INVALIDDATA; + } /* update codec info */ avctx->sample_rate = s->mp3decctx[0]->sample_rate; |