X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmadec.c;h=2dd5898d76083fc16b68a2ce128edb7b0988a3c7;hb=530cd2893e020206262a146d567c707ef93baf31;hp=3a08fe386cdfa3d05490b7b360aa121b08606c24;hpb=d00261a34bec5ea302e966882db6d0512373fcfa;p=ffmpeg diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c index 3a08fe386cd..2dd5898d760 100644 --- a/libavcodec/wmadec.c +++ b/libavcodec/wmadec.c @@ -1,26 +1,26 @@ /* * WMA compatible decoder - * Copyright (c) 2002 The FFmpeg Project + * Copyright (c) 2002 The Libav Project * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav 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 FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavcodec/wmadec.c + * @file * WMA compatible decoder. * This decoder handles Microsoft Windows Media Audio data, versions 1 & 2. * WMA v1 is identified by audio format 0x160 in Microsoft media files @@ -33,7 +33,9 @@ * should be 4 extra bytes for v1 data and 6 extra bytes for v2 data. */ +#include "libavutil/attributes.h" #include "avcodec.h" +#include "internal.h" #include "wma.h" #undef NDEBUG @@ -48,20 +50,6 @@ static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len); #ifdef TRACE -static void dump_shorts(WMACodecContext *s, const char *name, const short *tab, int n) -{ - int i; - - tprintf(s->avctx, "%s[%d]:\n", name, n); - for(i=0;iavctx, "%4d: ", i); - tprintf(s->avctx, " %5d.0", tab[i]); - if ((i & 7) == 7) - tprintf(s->avctx, "\n"); - } -} - static void dump_floats(WMACodecContext *s, const char *name, int prec, const float *tab, int n) { int i; @@ -79,24 +67,27 @@ static void dump_floats(WMACodecContext *s, const char *name, int prec, const fl } #endif -static int wma_decode_init(AVCodecContext * avctx) +static av_cold int wma_decode_init(AVCodecContext * avctx) { WMACodecContext *s = avctx->priv_data; int i, flags2; uint8_t *extradata; + if (!avctx->block_align) { + av_log(avctx, AV_LOG_ERROR, "block_align is not set\n"); + return AVERROR(EINVAL); + } + s->avctx = avctx; /* extract flag infos */ flags2 = 0; extradata = avctx->extradata; - if (avctx->codec->id == CODEC_ID_WMAV1 && avctx->extradata_size >= 4) { + if (avctx->codec->id == AV_CODEC_ID_WMAV1 && avctx->extradata_size >= 4) { flags2 = AV_RL16(extradata+2); - } else if (avctx->codec->id == CODEC_ID_WMAV2 && avctx->extradata_size >= 6) { + } else if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 6) { flags2 = AV_RL16(extradata+4); } -// for(i=0; iextradata_size; i++) -// av_log(NULL, AV_LOG_ERROR, "%02X ", extradata[i]); s->use_exp_vlc = flags2 & 0x0001; s->use_bit_reservoir = flags2 & 0x0002; @@ -107,7 +98,7 @@ static int wma_decode_init(AVCodecContext * avctx) /* init MDCT */ for(i = 0; i < s->nb_block_sizes; i++) - ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1, 1.0); + ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1, 1.0 / 32768.0); if (s->use_noise_coding) { init_vlc(&s->hgain_vlc, HGAINVLCBITS, sizeof(ff_wma_hgain_huffbits), @@ -123,7 +114,8 @@ static int wma_decode_init(AVCodecContext * avctx) wma_lsp_to_curve_init(s, s->frame_len); } - avctx->sample_fmt = SAMPLE_FMT_S16; + avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; + return 0; } @@ -152,7 +144,7 @@ static inline float pow_m1_4(WMACodecContext *s, float x) return s->lsp_pow_e_table[e] * (a + b * t.f); } -static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len) +static av_cold void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len) { float wdel, a, b; int i, e, m; @@ -178,15 +170,6 @@ static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len) s->lsp_pow_m_table2[i] = b - a; b = a; } -#if 0 - for(i=1;i<20;i++) { - float v, r1, r2; - v = 5.0 / i; - r1 = pow_m1_4(s, v); - r2 = pow(v,-0.25); - printf("%f^-0.25=%f e=%f\n", v, r1, r2 - r1); - } -#endif } /** @@ -361,7 +344,7 @@ static int decode_exp_vlc(WMACodecContext *s, int ch) } /* NOTE: this offset is the same as MPEG4 AAC ! */ last_exp += code - 60; - if ((unsigned)last_exp + 60 > FF_ARRAY_ELEMS(pow_tab)) { + if ((unsigned)last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) { av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n", last_exp); return -1; @@ -399,16 +382,16 @@ static void wma_window(WMACodecContext *s, float *out) block_len = s->block_len; bsize = s->frame_len_bits - s->block_len_bits; - s->dsp.vector_fmul_add(out, in, s->windows[bsize], - out, block_len); + s->fdsp.vector_fmul_add(out, in, s->windows[bsize], + out, block_len); } else { block_len = 1 << s->prev_block_len_bits; n = (s->block_len - block_len) / 2; bsize = s->frame_len_bits - s->prev_block_len_bits; - s->dsp.vector_fmul_add(out+n, in+n, s->windows[bsize], - out+n, block_len); + s->fdsp.vector_fmul_add(out+n, in+n, s->windows[bsize], + out+n, block_len); memcpy(out+n+block_len, in+n+block_len, n*sizeof(float)); } @@ -421,7 +404,7 @@ static void wma_window(WMACodecContext *s, float *out) block_len = s->block_len; bsize = s->frame_len_bits - s->block_len_bits; - s->dsp.vector_fmul_reverse(out, in, s->windows[bsize], block_len); + s->fdsp.vector_fmul_reverse(out, in, s->windows[bsize], block_len); } else { block_len = 1 << s->next_block_len_bits; @@ -430,7 +413,7 @@ static void wma_window(WMACodecContext *s, float *out) memcpy(out, in, n*sizeof(float)); - s->dsp.vector_fmul_reverse(out+n, in+n, s->windows[bsize], block_len); + s->fdsp.vector_fmul_reverse(out+n, in+n, s->windows[bsize], block_len); memset(out+n+block_len, 0, n*sizeof(float)); } @@ -447,6 +430,7 @@ static int wma_decode_block(WMACodecContext *s) int coef_nb_bits, total_gain; int nb_coefs[MAX_CHANNELS]; float mdct_norm; + FFTContext *mdct; #ifdef TRACE tprintf(s->avctx, "***decode_block: %d:%d\n", s->frame_count - 1, s->block_num); @@ -495,11 +479,11 @@ static int wma_decode_block(WMACodecContext *s) return -1; } - if (s->nb_channels == 2) { + if (s->avctx->channels == 2) { s->ms_stereo = get_bits1(&s->gb); } v = 0; - for(ch = 0; ch < s->nb_channels; ch++) { + for(ch = 0; ch < s->avctx->channels; ch++) { a = get_bits1(&s->gb); s->channel_coded[ch] = a; v |= a; @@ -526,13 +510,13 @@ static int wma_decode_block(WMACodecContext *s) /* compute number of coefficients */ n = s->coefs_end[bsize] - s->coefs_start; - for(ch = 0; ch < s->nb_channels; ch++) + for(ch = 0; ch < s->avctx->channels; ch++) nb_coefs[ch] = n; /* complex coding */ if (s->use_noise_coding) { - for(ch = 0; ch < s->nb_channels; ch++) { + for(ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { int i, n, a; n = s->exponent_high_sizes[bsize]; @@ -545,7 +529,7 @@ static int wma_decode_block(WMACodecContext *s) } } } - for(ch = 0; ch < s->nb_channels; ch++) { + for(ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { int i, n, val, code; @@ -573,7 +557,7 @@ static int wma_decode_block(WMACodecContext *s) /* exponents can be reused in short blocks. */ if ((s->block_len_bits == s->frame_len_bits) || get_bits1(&s->gb)) { - for(ch = 0; ch < s->nb_channels; ch++) { + for(ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { if (s->use_exp_vlc) { if (decode_exp_vlc(s, ch) < 0) @@ -587,7 +571,7 @@ static int wma_decode_block(WMACodecContext *s) } /* parse spectral coefficients : just RLE encoding */ - for(ch = 0; ch < s->nb_channels; ch++) { + for (ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { int tindex; WMACoef* ptr = &s->coefs1[ch][0]; @@ -601,7 +585,7 @@ static int wma_decode_block(WMACodecContext *s) 0, ptr, 0, nb_coefs[ch], s->block_len, s->frame_len_bits, coef_nb_bits); } - if (s->version == 1 && s->nb_channels >= 2) { + if (s->version == 1 && s->avctx->channels >= 2) { align_get_bits(&s->gb); } } @@ -616,7 +600,7 @@ static int wma_decode_block(WMACodecContext *s) } /* finally compute the MDCT coefficients */ - for(ch = 0; ch < s->nb_channels; ch++) { + for (ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { WMACoef *coefs1; float *coefs, *exponents, mult, mult1, noise; @@ -720,7 +704,7 @@ static int wma_decode_block(WMACodecContext *s) } #ifdef TRACE - for(ch = 0; ch < s->nb_channels; ch++) { + for (ch = 0; ch < s->avctx->channels; ch++) { if (s->channel_coded[ch]) { dump_floats(s, "exponents", 3, s->exponents[ch], s->block_len); dump_floats(s, "coefs", 1, s->coefs[ch], s->block_len); @@ -738,16 +722,18 @@ static int wma_decode_block(WMACodecContext *s) s->channel_coded[0] = 1; } - s->dsp.butterflies_float(s->coefs[0], s->coefs[1], s->block_len); + s->fdsp.butterflies_float(s->coefs[0], s->coefs[1], s->block_len); } next: - for(ch = 0; ch < s->nb_channels; ch++) { + mdct = &s->mdct_ctx[bsize]; + + for (ch = 0; ch < s->avctx->channels; ch++) { int n4, index; n4 = s->block_len / 2; if(s->channel_coded[ch]){ - ff_imdct_calc(&s->mdct_ctx[bsize], s->output, s->coefs[ch]); + mdct->imdct_calc(mdct, s->output, s->coefs[ch]); }else if(!(s->ms_stereo && ch==1)) memset(s->output, 0, sizeof(s->output)); @@ -766,11 +752,10 @@ next: } /* decode a frame of frame_len samples */ -static int wma_decode_frame(WMACodecContext *s, int16_t *samples) +static int wma_decode_frame(WMACodecContext *s, float **samples, + int samples_offset) { - int ret, i, n, ch, incr; - int16_t *ptr; - float *iptr; + int ret, ch; #ifdef TRACE tprintf(s->avctx, "***decode_frame: %d size=%d\n", s->frame_count++, s->frame_len); @@ -787,49 +772,33 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples) break; } - /* convert frame to integer */ - n = s->frame_len; - incr = s->nb_channels; - if (s->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) { - for(ch = 0; ch < s->nb_channels; ch++) { - ptr = samples + ch; - iptr = s->frame_out[ch]; - - for(i=0;iavctx->channels; ch++) { + /* copy current block to output */ + memcpy(samples[ch] + samples_offset, s->frame_out[ch], + s->frame_len * sizeof(*s->frame_out[ch])); /* prepare for next block */ memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len], - s->frame_len * sizeof(float)); - } - } else { - float *output[MAX_CHANNELS]; - for (ch = 0; ch < MAX_CHANNELS; ch++) - output[ch] = s->frame_out[ch]; - s->dsp.float_to_int16_interleave(samples, (const float **)output, n, incr); - for(ch = 0; ch < incr; ch++) { - /* prepare for next block */ - memmove(&s->frame_out[ch][0], &s->frame_out[ch][n], n * sizeof(float)); - } - } + s->frame_len * sizeof(*s->frame_out[ch])); #ifdef TRACE - dump_shorts(s, "samples", samples, n * s->nb_channels); + dump_floats(s, "samples", 6, samples[ch] + samples_offset, s->frame_len); #endif + } + return 0; } -static int wma_decode_superframe(AVCodecContext *avctx, - void *data, int *data_size, - AVPacket *avpkt) +static int wma_decode_superframe(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) { + AVFrame *frame = data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; WMACodecContext *s = avctx->priv_data; - int nb_frames, bit_offset, i, pos, len; + int nb_frames, bit_offset, i, pos, len, ret; uint8_t *q; - int16_t *samples; + float **samples; + int samples_offset; tprintf(avctx, "***decode_superframe:\n"); @@ -837,28 +806,43 @@ static int wma_decode_superframe(AVCodecContext *avctx, s->last_superframe_len = 0; return 0; } - if (buf_size < s->block_align) - return 0; - buf_size = s->block_align; - - samples = data; + if (buf_size < avctx->block_align) { + av_log(avctx, AV_LOG_ERROR, + "Input packet size too small (%d < %d)\n", + buf_size, avctx->block_align); + return AVERROR_INVALIDDATA; + } + buf_size = avctx->block_align; init_get_bits(&s->gb, buf, buf_size*8); if (s->use_bit_reservoir) { /* read super frame header */ skip_bits(&s->gb, 4); /* super frame index */ - nb_frames = get_bits(&s->gb, 4) - 1; + nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0); + } else { + nb_frames = 1; + } - if((nb_frames+1) * s->nb_channels * s->frame_len * sizeof(int16_t) > *data_size){ - av_log(s->avctx, AV_LOG_ERROR, "Insufficient output space\n"); - goto fail; - } + /* get output buffer */ + frame->nb_samples = nb_frames * s->frame_len; + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + samples = (float **)frame->extended_data; + samples_offset = 0; + if (s->use_bit_reservoir) { bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3); + if (bit_offset > get_bits_left(&s->gb)) { + av_log(avctx, AV_LOG_ERROR, + "Invalid last frame bit offset %d > buf size %d (%d)\n", + bit_offset, get_bits_left(&s->gb), buf_size); + goto fail; + } if (s->last_superframe_len > 0) { - // printf("skip=%d\n", s->last_bitoffset); /* add bit_offset bits to last frame */ if ((s->last_superframe_len + ((bit_offset + 7) >> 3)) > MAX_CODED_SUPERFRAME_SIZE) @@ -872,31 +856,35 @@ static int wma_decode_superframe(AVCodecContext *avctx, if (len > 0) { *q++ = (get_bits)(&s->gb, len) << (8 - len); } + memset(q, 0, FF_INPUT_BUFFER_PADDING_SIZE); /* XXX: bit_offset bits into last frame */ - init_get_bits(&s->gb, s->last_superframe, MAX_CODED_SUPERFRAME_SIZE*8); + init_get_bits(&s->gb, s->last_superframe, s->last_superframe_len * 8 + bit_offset); /* skip unused bits */ if (s->last_bitoffset > 0) skip_bits(&s->gb, s->last_bitoffset); /* this frame is stored in the last superframe and in the current one */ - if (wma_decode_frame(s, samples) < 0) + if (wma_decode_frame(s, samples, samples_offset) < 0) goto fail; - samples += s->nb_channels * s->frame_len; + samples_offset += s->frame_len; + nb_frames--; } /* read each frame starting from bit_offset */ pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3; - init_get_bits(&s->gb, buf + (pos >> 3), (MAX_CODED_SUPERFRAME_SIZE - (pos >> 3))*8); + if (pos >= MAX_CODED_SUPERFRAME_SIZE * 8 || pos > buf_size * 8) + return AVERROR_INVALIDDATA; + init_get_bits(&s->gb, buf + (pos >> 3), (buf_size - (pos >> 3))*8); len = pos & 7; if (len > 0) skip_bits(&s->gb, len); s->reset_block_lengths = 1; for(i=0;inb_channels * s->frame_len; + samples_offset += s->frame_len; } /* we copy the end of the frame in the last frame buffer */ @@ -911,20 +899,19 @@ static int wma_decode_superframe(AVCodecContext *avctx, s->last_superframe_len = len; memcpy(s->last_superframe, buf + pos, len); } else { - if(s->nb_channels * s->frame_len * sizeof(int16_t) > *data_size){ - av_log(s->avctx, AV_LOG_ERROR, "Insufficient output space\n"); - goto fail; - } /* single frame decode */ - if (wma_decode_frame(s, samples) < 0) + if (wma_decode_frame(s, samples, samples_offset) < 0) goto fail; - samples += s->nb_channels * s->frame_len; + samples_offset += s->frame_len; } -//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d outbytes:%d eaten:%d\n", s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len, (int8_t *)samples - (int8_t *)data, s->block_align); + av_dlog(s->avctx, "%d %d %d %d outbytes:%td eaten:%d\n", + s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len, + (int8_t *)samples - (int8_t *)data, avctx->block_align); + + *got_frame_ptr = 1; - *data_size = (int8_t *)samples - (int8_t *)data; - return s->block_align; + return avctx->block_align; fail: /* when error, we reset the bit reservoir */ s->last_superframe_len = 0; @@ -939,30 +926,32 @@ static av_cold void flush(AVCodecContext *avctx) s->last_superframe_len= 0; } -AVCodec wmav1_decoder = -{ - "wmav1", - CODEC_TYPE_AUDIO, - CODEC_ID_WMAV1, - sizeof(WMACodecContext), - wma_decode_init, - NULL, - ff_wma_end, - wma_decode_superframe, - .flush=flush, - .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"), +AVCodec ff_wmav1_decoder = { + .name = "wmav1", + .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"), + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_WMAV1, + .priv_data_size = sizeof(WMACodecContext), + .init = wma_decode_init, + .close = ff_wma_end, + .decode = wma_decode_superframe, + .flush = flush, + .capabilities = CODEC_CAP_DR1, + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, + AV_SAMPLE_FMT_NONE }, }; -AVCodec wmav2_decoder = -{ - "wmav2", - CODEC_TYPE_AUDIO, - CODEC_ID_WMAV2, - sizeof(WMACodecContext), - wma_decode_init, - NULL, - ff_wma_end, - wma_decode_superframe, - .flush=flush, - .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"), +AVCodec ff_wmav2_decoder = { + .name = "wmav2", + .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"), + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_WMAV2, + .priv_data_size = sizeof(WMACodecContext), + .init = wma_decode_init, + .close = ff_wma_end, + .decode = wma_decode_superframe, + .flush = flush, + .capabilities = CODEC_CAP_DR1, + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, + AV_SAMPLE_FMT_NONE }, };