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@ -26,13 +26,14 @@ |
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#include <stdint.h> |
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#include "avcodec.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/channel_layout.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#include "libavutil/crc.h" |
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#include "avcodec.h" |
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#include "bitstream.h" |
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#include "internal.h" |
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#include "parser.h" |
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#include "mlp_parser.h" |
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#include "mlpdsp.h" |
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@ -233,7 +234,7 @@ static inline int32_t calculate_sign_huff(MLPDecodeContext *m, |
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/** Read a sample, consisting of either, both or neither of entropy-coded MSBs
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* and plain LSBs. */ |
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static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp, |
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static inline int read_huff_channels(MLPDecodeContext *m, BitstreamContext *bc, |
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unsigned int substr, unsigned int pos) |
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{ |
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SubStream *s = &m->substream[substr]; |
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@ -241,7 +242,7 @@ static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp, |
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for (mat = 0; mat < s->num_primitive_matrices; mat++) |
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if (s->lsb_bypass[mat]) |
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m->bypassed_lsbs[pos + s->blockpos][mat] = get_bits1(gbp); |
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m->bypassed_lsbs[pos + s->blockpos][mat] = bitstream_read_bit(bc); |
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for (channel = s->min_channel; channel <= s->max_channel; channel++) { |
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ChannelParams *cp = &s->channel_params[channel]; |
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@ -251,14 +252,15 @@ static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp, |
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int result = 0; |
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if (codebook > 0) |
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result = get_vlc2(gbp, huff_vlc[codebook-1].table, |
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VLC_BITS, (9 + VLC_BITS - 1) / VLC_BITS); |
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result = bitstream_read_vlc(bc, huff_vlc[codebook-1].table, |
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VLC_BITS, |
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(9 + VLC_BITS - 1) / VLC_BITS); |
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if (result < 0) |
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return AVERROR_INVALIDDATA; |
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if (lsb_bits > 0) |
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result = (result << lsb_bits) + get_bits(gbp, lsb_bits); |
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result = (result << lsb_bits) + bitstream_read(bc, lsb_bits); |
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result += cp->sign_huff_offset; |
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result <<= quant_step_size; |
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@ -288,12 +290,12 @@ static av_cold int mlp_decode_init(AVCodecContext *avctx) |
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* information is not actually necessary for decoding, only for playback. |
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*/ |
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static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb) |
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static int read_major_sync(MLPDecodeContext *m, BitstreamContext *bc) |
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{ |
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MLPHeaderInfo mh; |
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int substr, ret; |
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if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, gb)) != 0) |
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if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, bc)) != 0) |
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return ret; |
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if (mh.group1_bits == 0) { |
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@ -441,7 +443,7 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb) |
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* required to decode the audio that do not change very often. Generally |
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* (always) present only in blocks following a major sync. */ |
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static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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static int read_restart_header(MLPDecodeContext *m, BitstreamContext *bc, |
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const uint8_t *buf, unsigned int substr) |
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{ |
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SubStream *s = &m->substream[substr]; |
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@ -449,13 +451,13 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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int sync_word, tmp; |
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uint8_t checksum; |
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uint8_t lossless_check; |
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int start_count = get_bits_count(gbp); |
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int start_count = bitstream_tell(bc); |
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int min_channel, max_channel, max_matrix_channel; |
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const int std_max_matrix_channel = m->avctx->codec_id == AV_CODEC_ID_MLP |
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? MAX_MATRIX_CHANNEL_MLP |
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: MAX_MATRIX_CHANNEL_TRUEHD; |
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sync_word = get_bits(gbp, 13); |
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sync_word = bitstream_read(bc, 13); |
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if (sync_word != 0x31ea >> 1) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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@ -463,18 +465,18 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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return AVERROR_INVALIDDATA; |
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} |
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s->noise_type = get_bits1(gbp); |
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s->noise_type = bitstream_read_bit(bc); |
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if (m->avctx->codec_id == AV_CODEC_ID_MLP && s->noise_type) { |
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av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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skip_bits(gbp, 16); /* Output timestamp */ |
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bitstream_skip(bc, 16); /* Output timestamp */ |
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min_channel = get_bits(gbp, 4); |
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max_channel = get_bits(gbp, 4); |
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max_matrix_channel = get_bits(gbp, 4); |
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min_channel = bitstream_read(bc, 4); |
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max_channel = bitstream_read(bc, 4); |
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max_matrix_channel = bitstream_read(bc, 4); |
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if (max_matrix_channel > std_max_matrix_channel) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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@ -518,13 +520,13 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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m->max_decoded_substream = substr; |
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} |
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s->noise_shift = get_bits(gbp, 4); |
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s->noisegen_seed = get_bits(gbp, 23); |
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s->noise_shift = bitstream_read(bc, 4); |
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s->noisegen_seed = bitstream_read(bc, 23); |
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skip_bits(gbp, 19); |
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bitstream_skip(bc, 19); |
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s->data_check_present = get_bits1(gbp); |
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lossless_check = get_bits(gbp, 8); |
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s->data_check_present = bitstream_read_bit(bc); |
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lossless_check = bitstream_read(bc, 8); |
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if (substr == m->max_decoded_substream |
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&& s->lossless_check_data != 0xffffffff) { |
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tmp = xor_32_to_8(s->lossless_check_data); |
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@ -534,12 +536,12 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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lossless_check, tmp); |
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} |
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skip_bits(gbp, 16); |
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bitstream_skip(bc, 16); |
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memset(s->ch_assign, 0, sizeof(s->ch_assign)); |
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for (ch = 0; ch <= s->max_matrix_channel; ch++) { |
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int ch_assign = get_bits(gbp, 6); |
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int ch_assign = bitstream_read(bc, 6); |
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if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD) { |
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uint64_t channel = thd_channel_layout_extract_channel(s->ch_layout, |
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ch_assign); |
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@ -555,9 +557,9 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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s->ch_assign[ch_assign] = ch; |
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} |
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checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count); |
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checksum = ff_mlp_restart_checksum(buf, bitstream_tell(bc) - start_count); |
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if (checksum != get_bits(gbp, 8)) |
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if (checksum != bitstream_read(bc, 8)) |
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av_log(m->avctx, AV_LOG_ERROR, "restart header checksum error\n"); |
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/* Set default decoding parameters. */ |
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@ -597,7 +599,7 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, |
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/** Read parameters for one of the prediction filters. */ |
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static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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static int read_filter_params(MLPDecodeContext *m, BitstreamContext *bc, |
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unsigned int substr, unsigned int channel, |
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unsigned int filter) |
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{ |
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@ -615,7 +617,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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return AVERROR_INVALIDDATA; |
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} |
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order = get_bits(gbp, 4); |
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order = bitstream_read(bc, 4); |
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if (order > max_order) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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"%cIR filter order %d is greater than maximum %d.\n", |
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@ -628,10 +630,10 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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int32_t *fcoeff = s->channel_params[channel].coeff[filter]; |
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int coeff_bits, coeff_shift; |
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fp->shift = get_bits(gbp, 4); |
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fp->shift = bitstream_read(bc, 4); |
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coeff_bits = get_bits(gbp, 5); |
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coeff_shift = get_bits(gbp, 3); |
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coeff_bits = bitstream_read(bc, 5); |
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coeff_shift = bitstream_read(bc, 3); |
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if (coeff_bits < 1 || coeff_bits > 16) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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"%cIR filter coeff_bits must be between 1 and 16.\n", |
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@ -646,9 +648,9 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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} |
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for (i = 0; i < order; i++) |
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fcoeff[i] = get_sbits(gbp, coeff_bits) << coeff_shift; |
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fcoeff[i] = bitstream_read_signed(bc, coeff_bits) << coeff_shift; |
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if (get_bits1(gbp)) { |
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if (bitstream_read_bit(bc)) { |
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int state_bits, state_shift; |
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if (filter == FIR) { |
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@ -657,13 +659,13 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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return AVERROR_INVALIDDATA; |
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} |
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state_bits = get_bits(gbp, 4); |
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state_shift = get_bits(gbp, 4); |
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state_bits = bitstream_read(bc, 4); |
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state_shift = bitstream_read(bc, 4); |
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/* TODO: Check validity of state data. */ |
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for (i = 0; i < order; i++) |
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fp->state[i] = get_sbits(gbp, state_bits) << state_shift; |
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fp->state[i] = bitstream_read_signed(bc, state_bits) << state_shift; |
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} |
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} |
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@ -672,7 +674,8 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, |
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/** Read parameters for primitive matrices. */ |
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static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitContext *gbp) |
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static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, |
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BitstreamContext *bc) |
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{ |
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SubStream *s = &m->substream[substr]; |
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unsigned int mat, ch; |
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@ -685,7 +688,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo |
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return AVERROR_INVALIDDATA; |
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} |
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s->num_primitive_matrices = get_bits(gbp, 4); |
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s->num_primitive_matrices = bitstream_read(bc, 4); |
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if (s->num_primitive_matrices > max_primitive_matrices) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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@ -696,9 +699,9 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo |
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for (mat = 0; mat < s->num_primitive_matrices; mat++) { |
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int frac_bits, max_chan; |
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s->matrix_out_ch[mat] = get_bits(gbp, 4); |
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frac_bits = get_bits(gbp, 4); |
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s->lsb_bypass [mat] = get_bits1(gbp); |
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s->matrix_out_ch[mat] = bitstream_read(bc, 4); |
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frac_bits = bitstream_read(bc, 4); |
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s->lsb_bypass[mat] = bitstream_read_bit(bc); |
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if (s->matrix_out_ch[mat] > s->max_matrix_channel) { |
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av_log(m->avctx, AV_LOG_ERROR, |
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@ -718,14 +721,14 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo |
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for (ch = 0; ch <= max_chan; ch++) { |
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int coeff_val = 0; |
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if (get_bits1(gbp)) |
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coeff_val = get_sbits(gbp, frac_bits + 2); |
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if (bitstream_read_bit(bc)) |
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coeff_val = bitstream_read_signed(bc, frac_bits + 2); |
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s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits); |
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} |
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if (s->noise_type) |
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s->matrix_noise_shift[mat] = get_bits(gbp, 4); |
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s->matrix_noise_shift[mat] = bitstream_read(bc, 4); |
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else |
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s->matrix_noise_shift[mat] = 0; |
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} |
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@ -736,7 +739,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo |
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/** Read channel parameters. */ |
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static int read_channel_params(MLPDecodeContext *m, unsigned int substr, |
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GetBitContext *gbp, unsigned int ch) |
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BitstreamContext *bc, unsigned int ch) |
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{ |
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SubStream *s = &m->substream[substr]; |
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ChannelParams *cp = &s->channel_params[ch]; |
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@ -745,13 +748,13 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr, |
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int ret; |
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if (s->param_presence_flags & PARAM_FIR) |
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if (get_bits1(gbp)) |
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if ((ret = read_filter_params(m, gbp, substr, ch, FIR)) < 0) |
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if (bitstream_read_bit(bc)) |
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if ((ret = read_filter_params(m, bc, substr, ch, FIR)) < 0) |
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return ret; |
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if (s->param_presence_flags & PARAM_IIR) |
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if (get_bits1(gbp)) |
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if ((ret = read_filter_params(m, gbp, substr, ch, IIR)) < 0) |
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if (bitstream_read_bit(bc)) |
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if ((ret = read_filter_params(m, bc, substr, ch, IIR)) < 0) |
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return ret; |
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if (fir->order + iir->order > 8) { |
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@ -774,11 +777,11 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr, |
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fir->shift = iir->shift; |
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if (s->param_presence_flags & PARAM_HUFFOFFSET) |
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if (get_bits1(gbp)) |
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cp->huff_offset = get_sbits(gbp, 15); |
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if (bitstream_read_bit(bc)) |
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cp->huff_offset = bitstream_read_signed(bc, 15); |
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cp->codebook = get_bits(gbp, 2); |
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cp->huff_lsbs = get_bits(gbp, 5); |
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cp->codebook = bitstream_read(bc, 2); |
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cp->huff_lsbs = bitstream_read(bc, 5); |
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if (cp->huff_lsbs > 24) { |
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av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n"); |
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@ -793,7 +796,7 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr, |
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/** Read decoding parameters that change more often than those in the restart
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* header. */ |
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static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp, |
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static int read_decoding_params(MLPDecodeContext *m, BitstreamContext *bc, |
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unsigned int substr) |
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{ |
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SubStream *s = &m->substream[substr]; |
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@ -801,12 +804,12 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp, |
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int ret; |
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if (s->param_presence_flags & PARAM_PRESENCE) |
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if (get_bits1(gbp)) |
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s->param_presence_flags = get_bits(gbp, 8); |
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if (bitstream_read_bit(bc)) |
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s->param_presence_flags = bitstream_read(bc, 8); |
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if (s->param_presence_flags & PARAM_BLOCKSIZE) |
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if (get_bits1(gbp)) { |
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s->blocksize = get_bits(gbp, 9); |
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if (bitstream_read_bit(bc)) { |
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s->blocksize = bitstream_read(bc, 9); |
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if (s->blocksize < 8 || s->blocksize > m->access_unit_size) { |
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av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize."); |
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s->blocksize = 0; |
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@ -815,14 +818,14 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp, |
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} |
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if (s->param_presence_flags & PARAM_MATRIX) |
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if (get_bits1(gbp)) |
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if ((ret = read_matrix_params(m, substr, gbp)) < 0) |
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if (bitstream_read_bit(bc)) |
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if ((ret = read_matrix_params(m, substr, bc)) < 0) |
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return ret; |
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if (s->param_presence_flags & PARAM_OUTSHIFT) |
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if (get_bits1(gbp)) { |
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if (bitstream_read_bit(bc)) { |
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for (ch = 0; ch <= s->max_matrix_channel; ch++) |
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s->output_shift[ch] = get_sbits(gbp, 4); |
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s->output_shift[ch] = bitstream_read_signed(bc, 4); |
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if (substr == m->max_decoded_substream) |
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m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign, |
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s->output_shift, |
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@ -831,18 +834,18 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp, |
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} |
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if (s->param_presence_flags & PARAM_QUANTSTEP) |
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if (get_bits1(gbp)) |
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if (bitstream_read_bit(bc)) |
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for (ch = 0; ch <= s->max_channel; ch++) { |
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ChannelParams *cp = &s->channel_params[ch]; |
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s->quant_step_size[ch] = get_bits(gbp, 4); |
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s->quant_step_size[ch] = bitstream_read(bc, 4); |
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cp->sign_huff_offset = calculate_sign_huff(m, substr, ch); |
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} |
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for (ch = s->min_channel; ch <= s->max_channel; ch++) |
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if (get_bits1(gbp)) |
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if ((ret = read_channel_params(m, substr, gbp, ch)) < 0) |
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if (bitstream_read_bit(bc)) |
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if ((ret = read_channel_params(m, substr, bc, ch)) < 0) |
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return ret; |
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return 0; |
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@ -880,7 +883,7 @@ static void filter_channel(MLPDecodeContext *m, unsigned int substr, |
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/** Read a block of PCM residual data (or actual if no filtering active). */ |
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static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp, |
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static int read_block_data(MLPDecodeContext *m, BitstreamContext *bc, |
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unsigned int substr) |
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{ |
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SubStream *s = &m->substream[substr]; |
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@ -888,8 +891,8 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp, |
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int ret; |
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if (s->data_check_present) { |
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expected_stream_pos = get_bits_count(gbp); |
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expected_stream_pos += get_bits(gbp, 16); |
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expected_stream_pos = bitstream_tell(bc); |
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expected_stream_pos += bitstream_read(bc, 16); |
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avpriv_request_sample(m->avctx, |
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"Substreams with VLC block size check info"); |
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} |
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@ -903,7 +906,7 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp, |
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s->blocksize * sizeof(m->bypassed_lsbs[0])); |
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for (i = 0; i < s->blocksize; i++) |
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if ((ret = read_huff_channels(m, gbp, substr, i)) < 0) |
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if ((ret = read_huff_channels(m, bc, substr, i)) < 0) |
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return ret; |
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for (ch = s->min_channel; ch <= s->max_channel; ch++) |
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@ -912,9 +915,9 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp, |
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s->blockpos += s->blocksize; |
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if (s->data_check_present) { |
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if (get_bits_count(gbp) != expected_stream_pos) |
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if (bitstream_tell(bc) != expected_stream_pos) |
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av_log(m->avctx, AV_LOG_ERROR, "block data length mismatch\n"); |
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skip_bits(gbp, 8); |
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bitstream_skip(bc, 8); |
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} |
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return 0; |
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@ -1074,7 +1077,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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const uint8_t *buf = avpkt->data; |
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int buf_size = avpkt->size; |
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MLPDecodeContext *m = avctx->priv_data; |
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GetBitContext gb; |
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BitstreamContext bc; |
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unsigned int length, substr; |
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unsigned int substream_start; |
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unsigned int header_size = 4; |
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@ -1092,11 +1095,11 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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if (length < 4 || length > buf_size) |
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return AVERROR_INVALIDDATA; |
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init_get_bits(&gb, (buf + 4), (length - 4) * 8); |
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bitstream_init(&bc, (buf + 4), (length - 4) * 8); |
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m->is_major_sync_unit = 0; |
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if (show_bits_long(&gb, 31) == (0xf8726fba >> 1)) { |
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if (read_major_sync(m, &gb) < 0) |
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if (bitstream_peek(&bc, 31) == (0xf8726fba >> 1)) { |
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if (read_major_sync(m, &bc) < 0) |
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goto error; |
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m->is_major_sync_unit = 1; |
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header_size += m->major_sync_header_size; |
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@ -1114,12 +1117,12 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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for (substr = 0; substr < m->num_substreams; substr++) { |
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int extraword_present, checkdata_present, end, nonrestart_substr; |
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extraword_present = get_bits1(&gb); |
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nonrestart_substr = get_bits1(&gb); |
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checkdata_present = get_bits1(&gb); |
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skip_bits1(&gb); |
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extraword_present = bitstream_read_bit(&bc); |
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nonrestart_substr = bitstream_read_bit(&bc); |
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checkdata_present = bitstream_read_bit(&bc); |
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bitstream_skip(&bc, 1); |
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end = get_bits(&gb, 12) * 2; |
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end = bitstream_read(&bc, 12) * 2; |
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substr_header_size += 2; |
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@ -1128,7 +1131,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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av_log(m->avctx, AV_LOG_ERROR, "There must be no extraword for MLP.\n"); |
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goto error; |
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} |
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skip_bits(&gb, 16); |
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bitstream_skip(&bc, 16); |
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substr_header_size += 2; |
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} |
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@ -1172,47 +1175,47 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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for (substr = 0; substr <= m->max_decoded_substream; substr++) { |
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SubStream *s = &m->substream[substr]; |
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init_get_bits(&gb, buf, substream_data_len[substr] * 8); |
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bitstream_init(&bc, buf, substream_data_len[substr] * 8); |
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m->matrix_changed = 0; |
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memset(m->filter_changed, 0, sizeof(m->filter_changed)); |
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s->blockpos = 0; |
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do { |
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if (get_bits1(&gb)) { |
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if (get_bits1(&gb)) { |
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if (bitstream_read_bit(&bc)) { |
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if (bitstream_read_bit(&bc)) { |
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/* A restart header should be present. */ |
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if (read_restart_header(m, &gb, buf, substr) < 0) |
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if (read_restart_header(m, &bc, buf, substr) < 0) |
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goto next_substr; |
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s->restart_seen = 1; |
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} |
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if (!s->restart_seen) |
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goto next_substr; |
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if (read_decoding_params(m, &gb, substr) < 0) |
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if (read_decoding_params(m, &bc, substr) < 0) |
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goto next_substr; |
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} |
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if (!s->restart_seen) |
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goto next_substr; |
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if ((ret = read_block_data(m, &gb, substr)) < 0) |
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if ((ret = read_block_data(m, &bc, substr)) < 0) |
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return ret; |
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if (get_bits_count(&gb) >= substream_data_len[substr] * 8) |
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if (bitstream_tell(&bc) >= substream_data_len[substr] * 8) |
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goto substream_length_mismatch; |
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} while (!get_bits1(&gb)); |
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} while (!bitstream_read_bit(&bc)); |
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skip_bits(&gb, (-get_bits_count(&gb)) & 15); |
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bitstream_skip(&bc, (-bitstream_tell(&bc)) & 15); |
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if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) { |
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if (substream_data_len[substr] * 8 - bitstream_tell(&bc) >= 32) { |
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int shorten_by; |
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if (get_bits(&gb, 16) != 0xD234) |
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if (bitstream_read(&bc, 16) != 0xD234) |
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return AVERROR_INVALIDDATA; |
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shorten_by = get_bits(&gb, 16); |
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shorten_by = bitstream_read(&bc, 16); |
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if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD && shorten_by & 0x2000) |
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s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos); |
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else if (m->avctx->codec_id == AV_CODEC_ID_MLP && shorten_by != 0xD234) |
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@ -1225,19 +1228,19 @@ static int read_access_unit(AVCodecContext *avctx, void* data, |
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if (substream_parity_present[substr]) { |
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uint8_t parity, checksum; |
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if (substream_data_len[substr] * 8 - get_bits_count(&gb) != 16) |
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if (substream_data_len[substr] * 8 - bitstream_tell(&bc) != 16) |
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goto substream_length_mismatch; |
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parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2); |
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checksum = ff_mlp_checksum8 (buf, substream_data_len[substr] - 2); |
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if ((get_bits(&gb, 8) ^ parity) != 0xa9 ) |
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if ((bitstream_read(&bc, 8) ^ parity) != 0xa9) |
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av_log(m->avctx, AV_LOG_ERROR, "Substream %d parity check failed.\n", substr); |
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if ( get_bits(&gb, 8) != checksum) |
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if (bitstream_read(&bc, 8) != checksum) |
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av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n" , substr); |
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} |
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if (substream_data_len[substr] * 8 != get_bits_count(&gb)) |
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if (substream_data_len[substr] * 8 != bitstream_tell(&bc)) |
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goto substream_length_mismatch; |
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next_substr: |
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