diff options
Diffstat (limited to 'libavcodec/imc.c')
| -rw-r--r-- | libavcodec/imc.c | 43 |
1 files changed, 33 insertions, 10 deletions
diff --git a/libavcodec/imc.c b/libavcodec/imc.c index c1fbd76..cbd7041 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -4,20 +4,20 @@ * Copyright (c) 2006 Benjamin Larsson * Copyright (c) 2006 Konstantin Shishkov * - * 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 */ @@ -38,6 +38,7 @@ #include "libavutil/channel_layout.h" #include "libavutil/float_dsp.h" #include "libavutil/internal.h" +#include "libavutil/libm.h" #include "avcodec.h" #include "get_bits.h" #include "dsputil.h" @@ -356,7 +357,7 @@ static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf, float tmp, tmp2; // maybe some frequency division thingy - flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125 + flcoeffs1[0] = 20000.0 / exp2 (levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125 flcoeffs2[0] = log2f(flcoeffs1[0]); tmp = flcoeffs1[0]; tmp2 = flcoeffs2[0]; @@ -450,8 +451,13 @@ static int bit_allocation(IMCContext *q, IMCChannel *chctx, for (i = 0; i < BANDS; i++) highest = FFMAX(highest, chctx->flcoeffs1[i]); - for (i = 0; i < BANDS - 1; i++) + for (i = 0; i < BANDS - 1; i++) { + if (chctx->flcoeffs5[i] <= 0) { + av_log(NULL, AV_LOG_ERROR, "flcoeffs5 %f invalid\n", chctx->flcoeffs5[i]); + return AVERROR_INVALIDDATA; + } chctx->flcoeffs4[i] = chctx->flcoeffs3[i] - log2f(chctx->flcoeffs5[i]); + } chctx->flcoeffs4[BANDS - 1] = limit; highest = highest * 0.25; @@ -887,6 +893,13 @@ static int imc_decode_block(AVCodecContext *avctx, IMCContext *q, int ch) imc_decode_level_coefficients2(q, chctx->levlCoeffBuf, chctx->old_floor, chctx->flcoeffs1, chctx->flcoeffs2); + for(i=0; i<BANDS; i++) { + if(chctx->flcoeffs1[i] > INT_MAX) { + av_log(avctx, AV_LOG_ERROR, "scalefactor out of range\n"); + return AVERROR_INVALIDDATA; + } + } + memcpy(chctx->old_floor, chctx->flcoeffs1, 32 * sizeof(float)); counter = 0; @@ -1006,10 +1019,8 @@ static int imc_decode_frame(AVCodecContext *avctx, void *data, /* get output buffer */ frame->nb_samples = COEFFS; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; - } for (i = 0; i < avctx->channels; i++) { q->out_samples = (float *)frame->extended_data[i]; @@ -1044,7 +1055,15 @@ static av_cold int imc_decode_close(AVCodecContext * avctx) return 0; } +static av_cold void flush(AVCodecContext *avctx) +{ + IMCContext *q = avctx->priv_data; + + q->chctx[0].decoder_reset = + q->chctx[1].decoder_reset = 1; +} +#if CONFIG_IMC_DECODER AVCodec ff_imc_decoder = { .name = "imc", .long_name = NULL_IF_CONFIG_SMALL("IMC (Intel Music Coder)"), @@ -1054,11 +1073,13 @@ AVCodec ff_imc_decoder = { .init = imc_decode_init, .close = imc_decode_close, .decode = imc_decode_frame, + .flush = flush, .capabilities = CODEC_CAP_DR1, .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }, }; - +#endif +#if CONFIG_IAC_DECODER AVCodec ff_iac_decoder = { .name = "iac", .long_name = NULL_IF_CONFIG_SMALL("IAC (Indeo Audio Coder)"), @@ -1068,7 +1089,9 @@ AVCodec ff_iac_decoder = { .init = imc_decode_init, .close = imc_decode_close, .decode = imc_decode_frame, + .flush = flush, .capabilities = CODEC_CAP_DR1, .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }, }; +#endif |
