static int latm_decode_audio_specific_config(struct LATMContext *latmctx, GetBitContext *gb, int asclen) { AACContext *ac = &latmctx->aac_ctx; AVCodecContext *avctx = ac->avctx; MPEG4AudioConfig m4ac = {0}; int config_start_bit = get_bits_count(gb); int sync_extension = 0; int bits_consumed, esize; if (asclen) { sync_extension = 1; asclen = FFMIN(asclen, get_bits_left(gb)); } else asclen = get_bits_left(gb); if (config_start_bit % 8) { av_log_missing_feature(latmctx->aac_ctx.avctx, "audio specific " "config not byte aligned.\n", 1); } bits_consumed = decode_audio_specific_config(NULL, avctx, &m4ac, gb->buffer + (config_start_bit / 8), asclen, sync_extension); if (bits_consumed < 0) if (ac->m4ac.sample_rate != m4ac.sample_rate || ac->m4ac.chan_config != m4ac.chan_config) { av_log(avctx, AV_LOG_INFO, "audio config changed\n"); latmctx->initialized = 0; esize = (bits_consumed+7) / 8; if (avctx->extradata_size < esize) { av_free(avctx->extradata); avctx->extradata = av_malloc(esize + FF_INPUT_BUFFER_PADDING_SIZE); if (!avctx->extradata) return AVERROR(ENOMEM); } avctx->extradata_size = esize; memcpy(avctx->extradata, gb->buffer + (config_start_bit/8), esize); memset(avctx->extradata+esize, 0, FF_INPUT_BUFFER_PADDING_SIZE); } skip_bits_long(gb, bits_consumed); return bits_consumed; }