diff options
Diffstat (limited to 'libavcodec/dss_sp.c')
-rw-r--r-- | libavcodec/dss_sp.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/libavcodec/dss_sp.c b/libavcodec/dss_sp.c index 6fadcc6..42ba1c4 100644 --- a/libavcodec/dss_sp.c +++ b/libavcodec/dss_sp.c @@ -2,20 +2,20 @@ * Digital Speech Standard - Standard Play mode (DSS SP) audio decoder. * Copyright (C) 2014 Oleksij Rempel <linux@rempel-privat.de> * - * 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 */ @@ -33,7 +33,7 @@ #define DSS_SP_FRAME_SIZE 42 #define DSS_SP_SAMPLE_COUNT (66 * SUBFRAMES) -#define DSS_SP_FORMULA(a, b, c) ((((a) << 15) + (b) * (c)) + 0x4000) >> 15 +#define DSS_SP_FORMULA(a, b, c) (((((a) << 15) + (b) * (c)) + 0x4000) >> 15) typedef struct DssSpSubframe { int16_t gain; @@ -50,6 +50,7 @@ typedef struct DssSpFrame { } DssSpFrame; typedef struct DssSpContext { + AVCodecContext *avctx; int32_t excitation[288 + 6]; int32_t history[187]; DssSpFrame fparam; @@ -296,6 +297,7 @@ static av_cold int dss_sp_decode_init(AVCodecContext *avctx) memset(p->history, 0, sizeof(p->history)); p->pulse_dec_mode = 1; + p->avctx = avctx; return 0; } @@ -378,7 +380,7 @@ static void dss_sp_unpack_coeffs(DssSpContext *p, const uint8_t *src) if (C72_binomials[index] <= combined_pulse_pos) { combined_pulse_pos -= C72_binomials[index]; - fparam->sf[subframe_idx].pulse_pos[(index ^ 7) - 1] = i; + fparam->sf[subframe_idx].pulse_pos[6 - index] = i; if (!index) break; @@ -400,10 +402,15 @@ static void dss_sp_unpack_coeffs(DssSpContext *p, const uint8_t *src) combined_pitch /= 151; - for (i = 1; i < SUBFRAMES; i++) { + for (i = 1; i < SUBFRAMES - 1; i++) { fparam->pitch_lag[i] = combined_pitch % 48; combined_pitch /= 48; } + if (combined_pitch > 47) { + av_log (p->avctx, AV_LOG_WARNING, "combined_pitch was too large\n"); + combined_pitch = 0; + } + fparam->pitch_lag[i] = combined_pitch; pitch_lag = fparam->pitch_lag[0]; for (i = 1; i < SUBFRAMES; i++) { |