diff options
Diffstat (limited to 'libavcodec/atrac3.c')
| -rw-r--r-- | libavcodec/atrac3.c | 46 |
1 files changed, 28 insertions, 18 deletions
diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c index a46b0b1..1e54784 100644 --- a/libavcodec/atrac3.c +++ b/libavcodec/atrac3.c @@ -3,20 +3,20 @@ * Copyright (c) 2006-2008 Maxim Poliakovski * Copyright (c) 2006-2008 Benjamin Larsson * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -37,6 +37,7 @@ #include <stdio.h> #include "libavutil/float_dsp.h" +#include "libavutil/libm.h" #include "avcodec.h" #include "bytestream.h" #include "fft.h" @@ -123,7 +124,7 @@ static float gain_tab1[16]; static float gain_tab2[31]; -/* +/** * Regular 512 points IMDCT without overlapping, with the exception of the * swapping of odd bands caused by the reverse spectra of the QMF. * @@ -202,7 +203,7 @@ static av_cold int atrac3_decode_close(AVCodecContext *avctx) return 0; } -/* +/** * Mantissa decoding * * @param selector which table the output values are coded with @@ -264,7 +265,7 @@ static void read_quant_spectral_coeffs(GetBitContext *gb, int selector, } } -/* +/** * Restore the quantized band spectrum coefficients * * @return subband count, fix for broken specification/files @@ -321,7 +322,7 @@ static int decode_spectrum(GetBitContext *gb, float *output) return num_subbands; } -/* +/** * Restore the quantized tonal components * * @param components tonal components @@ -405,7 +406,7 @@ static int decode_tonal_components(GetBitContext *gb, return component_count; } -/* +/** * Decode gain parameters for the coded bands * * @param block the gainblock for the current band @@ -440,7 +441,7 @@ static int decode_gain_control(GetBitContext *gb, GainBlock *block, return 0; } -/* +/** * Apply gain parameters and perform the MDCT overlapping part * * @param input input buffer @@ -497,7 +498,7 @@ static void gain_compensate_and_overlap(float *input, float *prev, memcpy(prev, &input[256], 256 * sizeof(*prev)); } -/* +/** * Combine the tonal band spectrum and regular band spectrum * * @param spectrum output spectrum buffer @@ -583,7 +584,7 @@ static void reverse_matrixing(float *su1, float *su2, int *prev_code, } break; default: - assert(0); + av_assert1(0); } } } @@ -624,7 +625,7 @@ static void channel_weighting(float *su1, float *su2, int *p3) } } -/* +/** * Decode a Sound Unit * * @param snd the channel unit to be used @@ -739,7 +740,7 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *databuf, /* set the bitstream reader at the start of the second Sound Unit*/ - init_get_bits(&q->gb, ptr1, avctx->block_align * 8); + init_get_bits8(&q->gb, ptr1, q->decoded_bytes_buffer + avctx->block_align - ptr1); /* Fill the Weighting coeffs delay buffer */ memmove(q->weighting_delay, &q->weighting_delay[2], @@ -837,7 +838,7 @@ static int atrac3_decode_frame(AVCodecContext *avctx, void *data, return avctx->block_align; } -static void atrac3_init_static_data(AVCodec *codec) +static void atrac3_init_static_data(void) { int i; @@ -856,14 +857,15 @@ static void atrac3_init_static_data(AVCodec *codec) /* Generate gain tables */ for (i = 0; i < 16; i++) - gain_tab1[i] = powf(2.0, (4 - i)); + gain_tab1[i] = exp2f (4 - i); for (i = -15; i < 16; i++) - gain_tab2[i + 15] = powf(2.0, i * -0.125); + gain_tab2[i + 15] = exp2f (i * -0.125); } static av_cold int atrac3_decode_init(AVCodecContext *avctx) { + static int static_init_done; int i, ret; int version, delay, samples_per_frame, frame_factor; const uint8_t *edata_ptr = avctx->extradata; @@ -874,6 +876,10 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) return AVERROR(EINVAL); } + if (!static_init_done) + atrac3_init_static_data(); + static_init_done = 1; + /* Take care of the codec-specific extradata. */ if (avctx->extradata_size == 14) { /* Parse the extradata, WAV format */ @@ -916,6 +922,11 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) return AVERROR(EINVAL); } + if (q->coding_mode == JOINT_STEREO && avctx->channels < 2) { + av_log(avctx, AV_LOG_ERROR, "Invalid coding mode\n"); + return AVERROR_INVALIDDATA; + } + /* Check the extradata */ if (version != 4) { @@ -998,7 +1009,6 @@ AVCodec ff_atrac3_decoder = { .id = AV_CODEC_ID_ATRAC3, .priv_data_size = sizeof(ATRAC3Context), .init = atrac3_decode_init, - .init_static_data = atrac3_init_static_data, .close = atrac3_decode_close, .decode = atrac3_decode_frame, .capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1, |
