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https://github.com/FFmpeg/FFmpeg.git
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29993b2947
Commit bdd31feec9 changed the SBC decoder to only set the output
sample format on init, instead of setting it explicitly on each frame,
which is correct. But the SBC parser overrides the sample format to S16,
which triggers a crash when combining the parser and the decoder.
Fix the issue by not setting the sample format anymore in the parser,
which is wrong.
Signed-off-by: James Almer <jamrial@gmail.com>
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* SBC parser
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*
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* Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
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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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#include "sbc.h"
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#include "parser.h"
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typedef struct SBCParseContext {
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ParseContext pc;
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uint8_t header[3];
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int header_size;
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int buffered_size;
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} SBCParseContext;
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static int sbc_parse_header(AVCodecParserContext *s, AVCodecContext *avctx,
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const uint8_t *data, size_t len)
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{
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static const int sample_rates[4] = { 16000, 32000, 44100, 48000 };
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int sr, blocks, mode, subbands, bitpool, channels, joint;
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int length;
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if (len < 3)
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return -1;
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if (data[0] == MSBC_SYNCWORD && data[1] == 0 && data[2] == 0) {
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avctx->channels = 1;
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avctx->sample_rate = 16000;
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avctx->frame_size = 120;
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s->duration = avctx->frame_size;
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return 57;
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}
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if (data[0] != SBC_SYNCWORD)
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return -2;
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sr = (data[1] >> 6) & 0x03;
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blocks = (((data[1] >> 4) & 0x03) + 1) << 2;
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mode = (data[1] >> 2) & 0x03;
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subbands = (((data[1] >> 0) & 0x01) + 1) << 2;
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bitpool = data[2];
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channels = mode == SBC_MODE_MONO ? 1 : 2;
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joint = mode == SBC_MODE_JOINT_STEREO;
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length = 4 + (subbands * channels) / 2
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+ ((((mode == SBC_MODE_DUAL_CHANNEL) + 1) * blocks * bitpool
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+ (joint * subbands)) + 7) / 8;
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avctx->channels = channels;
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avctx->sample_rate = sample_rates[sr];
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avctx->frame_size = subbands * blocks;
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s->duration = avctx->frame_size;
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return length;
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}
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static int sbc_parse(AVCodecParserContext *s, AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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SBCParseContext *pc = s->priv_data;
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int next;
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if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
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next = buf_size;
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} else {
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if (pc->header_size) {
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memcpy(pc->header + pc->header_size, buf,
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sizeof(pc->header) - pc->header_size);
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next = sbc_parse_header(s, avctx, pc->header, sizeof(pc->header))
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- pc->buffered_size;
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pc->header_size = 0;
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} else {
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next = sbc_parse_header(s, avctx, buf, buf_size);
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if (next >= buf_size)
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next = -1;
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}
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if (next < 0) {
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pc->header_size = FFMIN(sizeof(pc->header), buf_size);
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memcpy(pc->header, buf, pc->header_size);
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pc->buffered_size = buf_size;
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next = END_NOT_FOUND;
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}
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if (ff_combine_frame(&pc->pc, next, &buf, &buf_size) < 0) {
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*poutbuf = NULL;
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*poutbuf_size = 0;
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return buf_size;
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}
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}
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return next;
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}
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AVCodecParser ff_sbc_parser = {
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.codec_ids = { AV_CODEC_ID_SBC },
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.priv_data_size = sizeof(SBCParseContext),
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.parser_parse = sbc_parse,
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.parser_close = ff_parse_close,
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};
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