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/* |
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* FLAC (Free Lossless Audio Codec) decoder |
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* Copyright (c) 2003 Alex Beregszaszi |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* FLAC (Free Lossless Audio Codec) decoder |
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* @author Alex Beregszaszi |
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* @see http://flac.sourceforge.net/ |
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* |
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* This decoder can be used in 1 of 2 ways: Either raw FLAC data can be fed |
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* through, starting from the initial 'fLaC' signature; or by passing the |
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* 34-byte streaminfo structure through avctx->extradata[_size] followed |
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* by data starting with the 0xFFF8 marker. |
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*/ |
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#include <limits.h> |
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#include "libavutil/avassert.h" |
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#include "libavutil/crc.h" |
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#include "libavutil/opt.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "get_bits.h" |
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#include "bytestream.h" |
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#include "golomb.h" |
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#include "flac.h" |
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#include "flacdata.h" |
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#include "flacdsp.h" |
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#include "thread.h" |
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#include "unary.h" |
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typedef struct FLACContext { |
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AVClass *class; |
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struct FLACStreaminfo flac_stream_info; |
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AVCodecContext *avctx; ///< parent AVCodecContext |
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GetBitContext gb; ///< GetBitContext initialized to start at the current frame |
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int blocksize; ///< number of samples in the current frame |
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int sample_shift; ///< shift required to make output samples 16-bit or 32-bit |
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int ch_mode; ///< channel decorrelation type in the current frame |
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int got_streaminfo; ///< indicates if the STREAMINFO has been read |
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int32_t *decoded[FLAC_MAX_CHANNELS]; ///< decoded samples |
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uint8_t *decoded_buffer; |
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unsigned int decoded_buffer_size; |
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int buggy_lpc; ///< use workaround for old lavc encoded files |
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FLACDSPContext dsp; |
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} FLACContext; |
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static int allocate_buffers(FLACContext *s); |
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static void flac_set_bps(FLACContext *s) |
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{ |
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enum AVSampleFormat req = s->avctx->request_sample_fmt; |
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int need32 = s->flac_stream_info.bps > 16; |
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int want32 = av_get_bytes_per_sample(req) > 2; |
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int planar = av_sample_fmt_is_planar(req); |
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✓✓✗✓
|
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if (need32 || want32) { |
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✗✓ |
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if (planar) |
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s->avctx->sample_fmt = AV_SAMPLE_FMT_S32P; |
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else |
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s->avctx->sample_fmt = AV_SAMPLE_FMT_S32; |
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s->sample_shift = 32 - s->flac_stream_info.bps; |
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} else { |
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✗✓ |
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if (planar) |
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s->avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
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else |
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s->avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
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s->sample_shift = 16 - s->flac_stream_info.bps; |
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} |
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} |
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static av_cold int flac_decode_init(AVCodecContext *avctx) |
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{ |
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enum FLACExtradataFormat format; |
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uint8_t *streaminfo; |
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int ret; |
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FLACContext *s = avctx->priv_data; |
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s->avctx = avctx; |
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/* for now, the raw FLAC header is allowed to be passed to the decoder as |
104 |
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frame data instead of extradata. */ |
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✓✓ |
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if (!avctx->extradata) |
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return 0; |
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✗✓ |
80 |
if (!ff_flac_is_extradata_valid(avctx, &format, &streaminfo)) |
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return AVERROR_INVALIDDATA; |
110 |
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/* initialize based on the demuxer-supplied streamdata header */ |
112 |
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ret = ff_flac_parse_streaminfo(avctx, &s->flac_stream_info, streaminfo); |
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✗✓ |
80 |
if (ret < 0) |
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return ret; |
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ret = allocate_buffers(s); |
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✗✓ |
80 |
if (ret < 0) |
117 |
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return ret; |
118 |
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flac_set_bps(s); |
119 |
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ff_flacdsp_init(&s->dsp, avctx->sample_fmt, |
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s->flac_stream_info.channels, s->flac_stream_info.bps); |
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80 |
s->got_streaminfo = 1; |
122 |
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return 0; |
124 |
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} |
125 |
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static void dump_headers(AVCodecContext *avctx, FLACStreaminfo *s) |
127 |
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{ |
128 |
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av_log(avctx, AV_LOG_DEBUG, " Max Blocksize: %d\n", s->max_blocksize); |
129 |
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av_log(avctx, AV_LOG_DEBUG, " Max Framesize: %d\n", s->max_framesize); |
130 |
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av_log(avctx, AV_LOG_DEBUG, " Samplerate: %d\n", s->samplerate); |
131 |
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av_log(avctx, AV_LOG_DEBUG, " Channels: %d\n", s->channels); |
132 |
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av_log(avctx, AV_LOG_DEBUG, " Bits: %d\n", s->bps); |
133 |
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} |
134 |
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135 |
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static int allocate_buffers(FLACContext *s) |
136 |
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{ |
137 |
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int buf_size; |
138 |
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int ret; |
139 |
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140 |
✗✓ |
96 |
av_assert0(s->flac_stream_info.max_blocksize); |
141 |
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142 |
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buf_size = av_samples_get_buffer_size(NULL, s->flac_stream_info.channels, |
143 |
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s->flac_stream_info.max_blocksize, |
144 |
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AV_SAMPLE_FMT_S32P, 0); |
145 |
✗✓ |
96 |
if (buf_size < 0) |
146 |
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return buf_size; |
147 |
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148 |
|
96 |
av_fast_malloc(&s->decoded_buffer, &s->decoded_buffer_size, buf_size); |
149 |
✗✓ |
96 |
if (!s->decoded_buffer) |
150 |
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return AVERROR(ENOMEM); |
151 |
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152 |
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ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL, |
153 |
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s->decoded_buffer, |
154 |
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s->flac_stream_info.channels, |
155 |
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s->flac_stream_info.max_blocksize, |
156 |
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AV_SAMPLE_FMT_S32P, 0); |
157 |
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96 |
return ret < 0 ? ret : 0; |
158 |
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} |
159 |
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160 |
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/** |
161 |
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* Parse the STREAMINFO from an inline header. |
162 |
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* @param s the flac decoding context |
163 |
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* @param buf input buffer, starting with the "fLaC" marker |
164 |
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* @param buf_size buffer size |
165 |
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* @return non-zero if metadata is invalid |
166 |
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*/ |
167 |
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static int parse_streaminfo(FLACContext *s, const uint8_t *buf, int buf_size) |
168 |
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{ |
169 |
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int metadata_type, metadata_size, ret; |
170 |
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171 |
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if (buf_size < FLAC_STREAMINFO_SIZE+8) { |
172 |
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/* need more data */ |
173 |
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return 0; |
174 |
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} |
175 |
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flac_parse_block_header(&buf[4], NULL, &metadata_type, &metadata_size); |
176 |
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if (metadata_type != FLAC_METADATA_TYPE_STREAMINFO || |
177 |
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metadata_size != FLAC_STREAMINFO_SIZE) { |
178 |
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return AVERROR_INVALIDDATA; |
179 |
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} |
180 |
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ret = ff_flac_parse_streaminfo(s->avctx, &s->flac_stream_info, &buf[8]); |
181 |
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if (ret < 0) |
182 |
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return ret; |
183 |
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ret = allocate_buffers(s); |
184 |
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if (ret < 0) |
185 |
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return ret; |
186 |
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flac_set_bps(s); |
187 |
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ff_flacdsp_init(&s->dsp, s->avctx->sample_fmt, |
188 |
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s->flac_stream_info.channels, s->flac_stream_info.bps); |
189 |
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s->got_streaminfo = 1; |
190 |
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191 |
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return 0; |
192 |
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} |
193 |
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194 |
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/** |
195 |
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* Determine the size of an inline header. |
196 |
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* @param buf input buffer, starting with the "fLaC" marker |
197 |
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* @param buf_size buffer size |
198 |
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* @return number of bytes in the header, or 0 if more data is needed |
199 |
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*/ |
200 |
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static int get_metadata_size(const uint8_t *buf, int buf_size) |
201 |
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{ |
202 |
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int metadata_last, metadata_size; |
203 |
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const uint8_t *buf_end = buf + buf_size; |
204 |
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205 |
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buf += 4; |
206 |
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do { |
207 |
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if (buf_end - buf < 4) |
208 |
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return AVERROR_INVALIDDATA; |
209 |
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flac_parse_block_header(buf, &metadata_last, NULL, &metadata_size); |
210 |
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buf += 4; |
211 |
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if (buf_end - buf < metadata_size) { |
212 |
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/* need more data in order to read the complete header */ |
213 |
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return AVERROR_INVALIDDATA; |
214 |
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} |
215 |
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buf += metadata_size; |
216 |
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} while (!metadata_last); |
217 |
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218 |
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return buf_size - (buf_end - buf); |
219 |
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} |
220 |
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221 |
|
9879 |
static int decode_residuals(FLACContext *s, int32_t *decoded, int pred_order) |
222 |
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{ |
223 |
|
9879 |
GetBitContext gb = s->gb; |
224 |
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int i, tmp, partition, method_type, rice_order; |
225 |
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int rice_bits, rice_esc; |
226 |
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int samples; |
227 |
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228 |
|
9879 |
method_type = get_bits(&gb, 2); |
229 |
|
9879 |
rice_order = get_bits(&gb, 4); |
230 |
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|
231 |
|
9879 |
samples = s->blocksize >> rice_order; |
232 |
|
9879 |
rice_bits = 4 + method_type; |
233 |
|
9879 |
rice_esc = (1 << rice_bits) - 1; |
234 |
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|
235 |
|
9879 |
decoded += pred_order; |
236 |
|
9879 |
i = pred_order; |
237 |
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|
238 |
✗✓ |
9879 |
if (method_type > 1) { |
239 |
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av_log(s->avctx, AV_LOG_ERROR, "illegal residual coding method %d\n", |
240 |
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method_type); |
241 |
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return AVERROR_INVALIDDATA; |
242 |
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} |
243 |
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|
244 |
✗✓ |
9879 |
if (samples << rice_order != s->blocksize) { |
245 |
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av_log(s->avctx, AV_LOG_ERROR, "invalid rice order: %i blocksize %i\n", |
246 |
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rice_order, s->blocksize); |
247 |
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return AVERROR_INVALIDDATA; |
248 |
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} |
249 |
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|
250 |
✗✓ |
9879 |
if (pred_order > samples) { |
251 |
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av_log(s->avctx, AV_LOG_ERROR, "invalid predictor order: %i > %i\n", |
252 |
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pred_order, samples); |
253 |
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return AVERROR_INVALIDDATA; |
254 |
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} |
255 |
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|
256 |
✓✓ |
137939 |
for (partition = 0; partition < (1 << rice_order); partition++) { |
257 |
|
128061 |
tmp = get_bits(&gb, rice_bits); |
258 |
✗✓ |
128061 |
if (tmp == rice_esc) { |
259 |
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tmp = get_bits(&gb, 5); |
260 |
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for (; i < samples; i++) |
261 |
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*decoded++ = get_sbits_long(&gb, tmp); |
262 |
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} else { |
263 |
✓✓ |
128061 |
int real_limit = tmp ? (INT_MAX >> tmp) + 2 : INT_MAX; |
264 |
✓✓ |
55096400 |
for (; i < samples; i++) { |
265 |
|
54968340 |
int v = get_sr_golomb_flac(&gb, tmp, real_limit, 1); |
266 |
✓✓ |
54968340 |
if (v == 0x80000000){ |
267 |
|
1 |
av_log(s->avctx, AV_LOG_ERROR, "invalid residual\n"); |
268 |
|
1 |
return AVERROR_INVALIDDATA; |
269 |
|
|
} |
270 |
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|
271 |
|
54968339 |
*decoded++ = v; |
272 |
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} |
273 |
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} |
274 |
|
128060 |
i= 0; |
275 |
|
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} |
276 |
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|
277 |
|
9878 |
s->gb = gb; |
278 |
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|
279 |
|
9878 |
return 0; |
280 |
|
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} |
281 |
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|
282 |
|
935 |
static int decode_subframe_fixed(FLACContext *s, int32_t *decoded, |
283 |
|
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int pred_order, int bps) |
284 |
|
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{ |
285 |
|
935 |
const int blocksize = s->blocksize; |
286 |
|
935 |
unsigned av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d); |
287 |
|
|
int i; |
288 |
|
|
int ret; |
289 |
|
|
|
290 |
|
|
/* warm up samples */ |
291 |
✓✓ |
3597 |
for (i = 0; i < pred_order; i++) { |
292 |
|
2662 |
decoded[i] = get_sbits_long(&s->gb, bps); |
293 |
|
|
} |
294 |
|
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|
295 |
✗✓ |
935 |
if ((ret = decode_residuals(s, decoded, pred_order)) < 0) |
296 |
|
|
return ret; |
297 |
|
|
|
298 |
✓✓ |
935 |
if (pred_order > 0) |
299 |
|
837 |
a = decoded[pred_order-1]; |
300 |
✓✓ |
935 |
if (pred_order > 1) |
301 |
|
721 |
b = a - decoded[pred_order-2]; |
302 |
✓✓ |
935 |
if (pred_order > 2) |
303 |
|
591 |
c = b - decoded[pred_order-2] + decoded[pred_order-3]; |
304 |
✓✓ |
935 |
if (pred_order > 3) |
305 |
|
513 |
d = c - decoded[pred_order-2] + 2U*decoded[pred_order-3] - decoded[pred_order-4]; |
306 |
|
|
|
307 |
✓✓✓✓ ✓✗ |
935 |
switch (pred_order) { |
308 |
|
98 |
case 0: |
309 |
|
98 |
break; |
310 |
|
116 |
case 1: |
311 |
✓✓ |
505856 |
for (i = pred_order; i < blocksize; i++) |
312 |
|
505740 |
decoded[i] = a += decoded[i]; |
313 |
|
116 |
break; |
314 |
|
130 |
case 2: |
315 |
✓✓ |
549770 |
for (i = pred_order; i < blocksize; i++) |
316 |
|
549640 |
decoded[i] = a += b += decoded[i]; |
317 |
|
130 |
break; |
318 |
|
78 |
case 3: |
319 |
✓✓ |
117348 |
for (i = pred_order; i < blocksize; i++) |
320 |
|
117270 |
decoded[i] = a += b += c += decoded[i]; |
321 |
|
78 |
break; |
322 |
|
513 |
case 4: |
323 |
✓✓ |
587997 |
for (i = pred_order; i < blocksize; i++) |
324 |
|
587484 |
decoded[i] = a += b += c += d += decoded[i]; |
325 |
|
513 |
break; |
326 |
|
|
default: |
327 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "illegal pred order %d\n", pred_order); |
328 |
|
|
return AVERROR_INVALIDDATA; |
329 |
|
|
} |
330 |
|
|
|
331 |
|
935 |
return 0; |
332 |
|
|
} |
333 |
|
|
|
334 |
|
1926 |
static void lpc_analyze_remodulate(SUINT32 *decoded, const int coeffs[32], |
335 |
|
|
int order, int qlevel, int len, int bps) |
336 |
|
|
{ |
337 |
|
|
int i, j; |
338 |
|
1926 |
int ebps = 1 << (bps-1); |
339 |
|
1926 |
unsigned sigma = 0; |
340 |
|
|
|
341 |
✓✓ |
8450138 |
for (i = order; i < len; i++) |
342 |
|
8448212 |
sigma |= decoded[i] + ebps; |
343 |
|
|
|
344 |
✓✗ |
1926 |
if (sigma < 2*ebps) |
345 |
|
1926 |
return; |
346 |
|
|
|
347 |
|
|
for (i = len - 1; i >= order; i--) { |
348 |
|
|
int64_t p = 0; |
349 |
|
|
for (j = 0; j < order; j++) |
350 |
|
|
p += coeffs[j] * (int64_t)(int32_t)decoded[i-order+j]; |
351 |
|
|
decoded[i] -= p >> qlevel; |
352 |
|
|
} |
353 |
|
|
for (i = order; i < len; i++, decoded++) { |
354 |
|
|
int32_t p = 0; |
355 |
|
|
for (j = 0; j < order; j++) |
356 |
|
|
p += coeffs[j] * (uint32_t)decoded[j]; |
357 |
|
|
decoded[j] += p >> qlevel; |
358 |
|
|
} |
359 |
|
|
} |
360 |
|
|
|
361 |
|
8944 |
static int decode_subframe_lpc(FLACContext *s, int32_t *decoded, int pred_order, |
362 |
|
|
int bps) |
363 |
|
|
{ |
364 |
|
|
int i, ret; |
365 |
|
|
int coeff_prec, qlevel; |
366 |
|
|
int coeffs[32]; |
367 |
|
|
|
368 |
|
|
/* warm up samples */ |
369 |
✓✓ |
44896 |
for (i = 0; i < pred_order; i++) { |
370 |
|
35952 |
decoded[i] = get_sbits_long(&s->gb, bps); |
371 |
|
|
} |
372 |
|
|
|
373 |
|
8944 |
coeff_prec = get_bits(&s->gb, 4) + 1; |
374 |
✗✓ |
8944 |
if (coeff_prec == 16) { |
375 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "invalid coeff precision\n"); |
376 |
|
|
return AVERROR_INVALIDDATA; |
377 |
|
|
} |
378 |
|
8944 |
qlevel = get_sbits(&s->gb, 5); |
379 |
✗✓ |
8944 |
if (qlevel < 0) { |
380 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "qlevel %d not supported, maybe buggy stream\n", |
381 |
|
|
qlevel); |
382 |
|
|
return AVERROR_INVALIDDATA; |
383 |
|
|
} |
384 |
|
|
|
385 |
✓✓ |
44896 |
for (i = 0; i < pred_order; i++) { |
386 |
|
35952 |
coeffs[pred_order - i - 1] = get_sbits(&s->gb, coeff_prec); |
387 |
|
|
} |
388 |
|
|
|
389 |
✓✓ |
8944 |
if ((ret = decode_residuals(s, decoded, pred_order)) < 0) |
390 |
|
1 |
return ret; |
391 |
|
|
|
392 |
✗✓✗✗
|
8943 |
if ( ( s->buggy_lpc && s->flac_stream_info.bps <= 16) |
393 |
✓✗✓✓
|
8943 |
|| ( !s->buggy_lpc && bps <= 16 |
394 |
✓✓ |
6861 |
&& bps + coeff_prec + av_log2(pred_order) <= 32)) { |
395 |
|
6171 |
s->dsp.lpc16(decoded, coeffs, pred_order, qlevel, s->blocksize); |
396 |
|
|
} else { |
397 |
|
2772 |
s->dsp.lpc32(decoded, coeffs, pred_order, qlevel, s->blocksize); |
398 |
✓✓ |
2772 |
if (s->flac_stream_info.bps <= 16) |
399 |
|
1926 |
lpc_analyze_remodulate(decoded, coeffs, pred_order, qlevel, s->blocksize, bps); |
400 |
|
|
} |
401 |
|
|
|
402 |
|
8943 |
return 0; |
403 |
|
|
} |
404 |
|
|
|
405 |
|
15588 |
static inline int decode_subframe(FLACContext *s, int channel) |
406 |
|
|
{ |
407 |
|
15588 |
int32_t *decoded = s->decoded[channel]; |
408 |
|
15588 |
int type, wasted = 0; |
409 |
|
15588 |
int bps = s->flac_stream_info.bps; |
410 |
|
|
int i, tmp, ret; |
411 |
|
|
|
412 |
✓✓ |
15588 |
if (channel == 0) { |
413 |
✓✓ |
5738 |
if (s->ch_mode == FLAC_CHMODE_RIGHT_SIDE) |
414 |
|
549 |
bps++; |
415 |
|
|
} else { |
416 |
✓✓✓✓
|
9850 |
if (s->ch_mode == FLAC_CHMODE_LEFT_SIDE || s->ch_mode == FLAC_CHMODE_MID_SIDE) |
417 |
|
2324 |
bps++; |
418 |
|
|
} |
419 |
|
|
|
420 |
✗✓ |
15588 |
if (get_bits1(&s->gb)) { |
421 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "invalid subframe padding\n"); |
422 |
|
|
return AVERROR_INVALIDDATA; |
423 |
|
|
} |
424 |
|
15588 |
type = get_bits(&s->gb, 6); |
425 |
|
|
|
426 |
✓✓ |
15588 |
if (get_bits1(&s->gb)) { |
427 |
|
5234 |
int left = get_bits_left(&s->gb); |
428 |
✓✗✗✓
|
5234 |
if ( left <= 0 || |
429 |
✗✗✗✓
|
5234 |
(left < bps && !show_bits_long(&s->gb, left)) || |
430 |
|
5234 |
!show_bits_long(&s->gb, bps)) { |
431 |
|
|
av_log(s->avctx, AV_LOG_ERROR, |
432 |
|
|
"Invalid number of wasted bits > available bits (%d) - left=%d\n", |
433 |
|
|
bps, left); |
434 |
|
|
return AVERROR_INVALIDDATA; |
435 |
|
|
} |
436 |
|
5234 |
wasted = 1 + get_unary(&s->gb, 1, get_bits_left(&s->gb)); |
437 |
|
5234 |
bps -= wasted; |
438 |
|
|
} |
439 |
✗✓ |
15588 |
if (bps > 32) { |
440 |
|
|
avpriv_report_missing_feature(s->avctx, "Decorrelated bit depth > 32"); |
441 |
|
|
return AVERROR_PATCHWELCOME; |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
//FIXME use av_log2 for types |
445 |
✓✓ |
15588 |
if (type == 0) { |
446 |
|
5709 |
tmp = get_sbits_long(&s->gb, bps); |
447 |
✓✓ |
35439693 |
for (i = 0; i < s->blocksize; i++) |
448 |
|
35433984 |
decoded[i] = tmp; |
449 |
✗✓ |
9879 |
} else if (type == 1) { |
450 |
|
|
for (i = 0; i < s->blocksize; i++) |
451 |
|
|
decoded[i] = get_sbits_long(&s->gb, bps); |
452 |
✓✗✓✓
|
9879 |
} else if ((type >= 8) && (type <= 12)) { |
453 |
✗✓ |
935 |
if ((ret = decode_subframe_fixed(s, decoded, type & ~0x8, bps)) < 0) |
454 |
|
|
return ret; |
455 |
✓✗ |
8944 |
} else if (type >= 32) { |
456 |
✓✓ |
8944 |
if ((ret = decode_subframe_lpc(s, decoded, (type & ~0x20)+1, bps)) < 0) |
457 |
|
1 |
return ret; |
458 |
|
|
} else { |
459 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "invalid coding type\n"); |
460 |
|
|
return AVERROR_INVALIDDATA; |
461 |
|
|
} |
462 |
|
|
|
463 |
✓✓✓✗
|
15587 |
if (wasted && wasted < 32) { |
464 |
|
|
int i; |
465 |
✓✓ |
34184058 |
for (i = 0; i < s->blocksize; i++) |
466 |
|
34178824 |
decoded[i] = (unsigned)decoded[i] << wasted; |
467 |
|
|
} |
468 |
|
|
|
469 |
|
15587 |
return 0; |
470 |
|
|
} |
471 |
|
|
|
472 |
|
5738 |
static int decode_frame(FLACContext *s) |
473 |
|
|
{ |
474 |
|
|
int i, ret; |
475 |
|
5738 |
GetBitContext *gb = &s->gb; |
476 |
|
|
FLACFrameInfo fi; |
477 |
|
|
|
478 |
✗✓ |
5738 |
if ((ret = ff_flac_decode_frame_header(s->avctx, gb, &fi, 0)) < 0) { |
479 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "invalid frame header\n"); |
480 |
|
|
return ret; |
481 |
|
|
} |
482 |
|
|
|
483 |
✓✓ |
5738 |
if ( s->flac_stream_info.channels |
484 |
✗✓ |
5722 |
&& fi.channels != s->flac_stream_info.channels |
485 |
|
|
&& s->got_streaminfo) { |
486 |
|
|
s->flac_stream_info.channels = s->avctx->channels = fi.channels; |
487 |
|
|
ff_flac_set_channel_layout(s->avctx); |
488 |
|
|
ret = allocate_buffers(s); |
489 |
|
|
if (ret < 0) |
490 |
|
|
return ret; |
491 |
|
|
} |
492 |
|
5738 |
s->flac_stream_info.channels = s->avctx->channels = fi.channels; |
493 |
✗✓ |
5738 |
if (!s->avctx->channel_layout) |
494 |
|
|
ff_flac_set_channel_layout(s->avctx); |
495 |
|
5738 |
s->ch_mode = fi.ch_mode; |
496 |
|
|
|
497 |
✓✓✗✓
|
5738 |
if (!s->flac_stream_info.bps && !fi.bps) { |
498 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "bps not found in STREAMINFO or frame header\n"); |
499 |
|
|
return AVERROR_INVALIDDATA; |
500 |
|
|
} |
501 |
✗✓ |
5738 |
if (!fi.bps) { |
502 |
|
|
fi.bps = s->flac_stream_info.bps; |
503 |
✓✓✗✓
|
5738 |
} else if (s->flac_stream_info.bps && fi.bps != s->flac_stream_info.bps) { |
504 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "switching bps mid-stream is not " |
505 |
|
|
"supported\n"); |
506 |
|
|
return AVERROR_INVALIDDATA; |
507 |
|
|
} |
508 |
|
|
|
509 |
✓✓ |
5738 |
if (!s->flac_stream_info.bps) { |
510 |
|
16 |
s->flac_stream_info.bps = s->avctx->bits_per_raw_sample = fi.bps; |
511 |
|
16 |
flac_set_bps(s); |
512 |
|
|
} |
513 |
|
|
|
514 |
✓✓ |
5738 |
if (!s->flac_stream_info.max_blocksize) |
515 |
|
16 |
s->flac_stream_info.max_blocksize = FLAC_MAX_BLOCKSIZE; |
516 |
✗✓ |
5738 |
if (fi.blocksize > s->flac_stream_info.max_blocksize) { |
517 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "blocksize %d > %d\n", fi.blocksize, |
518 |
|
|
s->flac_stream_info.max_blocksize); |
519 |
|
|
return AVERROR_INVALIDDATA; |
520 |
|
|
} |
521 |
|
5738 |
s->blocksize = fi.blocksize; |
522 |
|
|
|
523 |
✓✓✗✓
|
5738 |
if (!s->flac_stream_info.samplerate && !fi.samplerate) { |
524 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "sample rate not found in STREAMINFO" |
525 |
|
|
" or frame header\n"); |
526 |
|
|
return AVERROR_INVALIDDATA; |
527 |
|
|
} |
528 |
✗✓ |
5738 |
if (fi.samplerate == 0) |
529 |
|
|
fi.samplerate = s->flac_stream_info.samplerate; |
530 |
|
5738 |
s->flac_stream_info.samplerate = s->avctx->sample_rate = fi.samplerate; |
531 |
|
|
|
532 |
✓✓ |
5738 |
if (!s->got_streaminfo) { |
533 |
|
16 |
ret = allocate_buffers(s); |
534 |
✗✓ |
16 |
if (ret < 0) |
535 |
|
|
return ret; |
536 |
|
16 |
s->got_streaminfo = 1; |
537 |
|
16 |
dump_headers(s->avctx, &s->flac_stream_info); |
538 |
|
|
} |
539 |
|
5738 |
ff_flacdsp_init(&s->dsp, s->avctx->sample_fmt, |
540 |
|
|
s->flac_stream_info.channels, s->flac_stream_info.bps); |
541 |
|
|
|
542 |
|
|
// dump_headers(s->avctx, &s->flac_stream_info); |
543 |
|
|
|
544 |
|
|
/* subframes */ |
545 |
✓✓ |
21325 |
for (i = 0; i < s->flac_stream_info.channels; i++) { |
546 |
✓✓ |
15588 |
if ((ret = decode_subframe(s, i)) < 0) |
547 |
|
1 |
return ret; |
548 |
|
|
} |
549 |
|
|
|
550 |
|
5737 |
align_get_bits(gb); |
551 |
|
|
|
552 |
|
|
/* frame footer */ |
553 |
|
5737 |
skip_bits(gb, 16); /* data crc */ |
554 |
|
|
|
555 |
|
5737 |
return 0; |
556 |
|
|
} |
557 |
|
|
|
558 |
|
5738 |
static int flac_decode_frame(AVCodecContext *avctx, void *data, |
559 |
|
|
int *got_frame_ptr, AVPacket *avpkt) |
560 |
|
|
{ |
561 |
|
5738 |
AVFrame *frame = data; |
562 |
|
5738 |
ThreadFrame tframe = { .f = data }; |
563 |
|
5738 |
const uint8_t *buf = avpkt->data; |
564 |
|
5738 |
int buf_size = avpkt->size; |
565 |
|
5738 |
FLACContext *s = avctx->priv_data; |
566 |
|
5738 |
int bytes_read = 0; |
567 |
|
|
int ret; |
568 |
|
|
|
569 |
|
5738 |
*got_frame_ptr = 0; |
570 |
|
|
|
571 |
✓✓ |
5738 |
if (s->flac_stream_info.max_framesize == 0) { |
572 |
|
16 |
s->flac_stream_info.max_framesize = |
573 |
✗✓ |
16 |
ff_flac_get_max_frame_size(s->flac_stream_info.max_blocksize ? s->flac_stream_info.max_blocksize : FLAC_MAX_BLOCKSIZE, |
574 |
|
|
FLAC_MAX_CHANNELS, 32); |
575 |
|
|
} |
576 |
|
|
|
577 |
✓✗✗✓
|
5738 |
if (buf_size > 5 && !memcmp(buf, "\177FLAC", 5)) { |
578 |
|
|
av_log(s->avctx, AV_LOG_DEBUG, "skipping flac header packet 1\n"); |
579 |
|
|
return buf_size; |
580 |
|
|
} |
581 |
|
|
|
582 |
✓✗✗✓
|
5738 |
if (buf_size > 0 && (*buf & 0x7F) == FLAC_METADATA_TYPE_VORBIS_COMMENT) { |
583 |
|
|
av_log(s->avctx, AV_LOG_DEBUG, "skipping vorbis comment\n"); |
584 |
|
|
return buf_size; |
585 |
|
|
} |
586 |
|
|
|
587 |
|
|
/* check that there is at least the smallest decodable amount of data. |
588 |
|
|
this amount corresponds to the smallest valid FLAC frame possible. |
589 |
|
|
FF F8 69 02 00 00 9A 00 00 34 46 */ |
590 |
✗✓ |
5738 |
if (buf_size < FLAC_MIN_FRAME_SIZE) |
591 |
|
|
return buf_size; |
592 |
|
|
|
593 |
|
|
/* check for inline header */ |
594 |
✗✓ |
5738 |
if (AV_RB32(buf) == MKBETAG('f','L','a','C')) { |
595 |
|
|
if (!s->got_streaminfo && (ret = parse_streaminfo(s, buf, buf_size))) { |
596 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "invalid header\n"); |
597 |
|
|
return ret; |
598 |
|
|
} |
599 |
|
|
return get_metadata_size(buf, buf_size); |
600 |
|
|
} |
601 |
|
|
|
602 |
|
|
/* decode frame */ |
603 |
✗✓ |
5738 |
if ((ret = init_get_bits8(&s->gb, buf, buf_size)) < 0) |
604 |
|
|
return ret; |
605 |
✓✓ |
5738 |
if ((ret = decode_frame(s)) < 0) { |
606 |
|
1 |
av_log(s->avctx, AV_LOG_ERROR, "decode_frame() failed\n"); |
607 |
|
1 |
return ret; |
608 |
|
|
} |
609 |
|
5737 |
bytes_read = get_bits_count(&s->gb)/8; |
610 |
|
|
|
611 |
✗✓ |
5737 |
if ((s->avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_COMPLIANT)) && |
612 |
|
|
av_crc(av_crc_get_table(AV_CRC_16_ANSI), |
613 |
|
|
0, buf, bytes_read)) { |
614 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "CRC error at PTS %"PRId64"\n", avpkt->pts); |
615 |
|
|
if (s->avctx->err_recognition & AV_EF_EXPLODE) |
616 |
|
|
return AVERROR_INVALIDDATA; |
617 |
|
|
} |
618 |
|
|
|
619 |
|
|
/* get output buffer */ |
620 |
|
5737 |
frame->nb_samples = s->blocksize; |
621 |
✗✓ |
5737 |
if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0) |
622 |
|
|
return ret; |
623 |
|
|
|
624 |
|
5737 |
s->dsp.decorrelate[s->ch_mode](frame->data, s->decoded, |
625 |
|
|
s->flac_stream_info.channels, |
626 |
|
|
s->blocksize, s->sample_shift); |
627 |
|
|
|
628 |
✗✓ |
5737 |
if (bytes_read > buf_size) { |
629 |
|
|
av_log(s->avctx, AV_LOG_ERROR, "overread: %d\n", bytes_read - buf_size); |
630 |
|
|
return AVERROR_INVALIDDATA; |
631 |
|
|
} |
632 |
✗✓ |
5737 |
if (bytes_read < buf_size) { |
633 |
|
|
av_log(s->avctx, AV_LOG_DEBUG, "underread: %d orig size: %d\n", |
634 |
|
|
buf_size - bytes_read, buf_size); |
635 |
|
|
} |
636 |
|
|
|
637 |
|
5737 |
*got_frame_ptr = 1; |
638 |
|
|
|
639 |
|
5737 |
return bytes_read; |
640 |
|
|
} |
641 |
|
|
|
642 |
|
96 |
static av_cold int flac_decode_close(AVCodecContext *avctx) |
643 |
|
|
{ |
644 |
|
96 |
FLACContext *s = avctx->priv_data; |
645 |
|
|
|
646 |
|
96 |
av_freep(&s->decoded_buffer); |
647 |
|
|
|
648 |
|
96 |
return 0; |
649 |
|
|
} |
650 |
|
|
|
651 |
|
|
static const AVOption options[] = { |
652 |
|
|
{ "use_buggy_lpc", "emulate old buggy lavc behavior", offsetof(FLACContext, buggy_lpc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM }, |
653 |
|
|
{ NULL }, |
654 |
|
|
}; |
655 |
|
|
|
656 |
|
|
static const AVClass flac_decoder_class = { |
657 |
|
|
.class_name = "FLAC decoder", |
658 |
|
|
.item_name = av_default_item_name, |
659 |
|
|
.option = options, |
660 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
661 |
|
|
}; |
662 |
|
|
|
663 |
|
|
AVCodec ff_flac_decoder = { |
664 |
|
|
.name = "flac", |
665 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"), |
666 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
667 |
|
|
.id = AV_CODEC_ID_FLAC, |
668 |
|
|
.priv_data_size = sizeof(FLACContext), |
669 |
|
|
.init = flac_decode_init, |
670 |
|
|
.close = flac_decode_close, |
671 |
|
|
.decode = flac_decode_frame, |
672 |
|
|
.capabilities = AV_CODEC_CAP_CHANNEL_CONF | |
673 |
|
|
AV_CODEC_CAP_DR1 | |
674 |
|
|
AV_CODEC_CAP_FRAME_THREADS, |
675 |
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16, |
676 |
|
|
AV_SAMPLE_FMT_S16P, |
677 |
|
|
AV_SAMPLE_FMT_S32, |
678 |
|
|
AV_SAMPLE_FMT_S32P, |
679 |
|
|
AV_SAMPLE_FMT_NONE }, |
680 |
|
|
.priv_class = &flac_decoder_class, |
681 |
|
|
}; |