static av_cold int eightsvx_decode_init(AVCodecContext *avctx) { EightSvxContext *esc = avctx->priv_data; if (avctx->channels < 1 || avctx->channels > 2) { av_log(avctx, AV_LOG_ERROR, "8SVX does not support more than 2 channels\n"); return AVERROR_INVALIDDATA; } switch (avctx->codec->id) { case AV_CODEC_ID_8SVX_FIB: esc->table = fibonacci; break; case AV_CODEC_ID_8SVX_EXP: esc->table = exponential; break; case AV_CODEC_ID_PCM_S8_PLANAR: case AV_CODEC_ID_8SVX_RAW: esc->table = NULL; break; default: av_log(avctx, AV_LOG_ERROR, "Invalid codec id %d.\n", avctx->codec->id); return AVERROR_INVALIDDATA; } avctx->sample_fmt = AV_SAMPLE_FMT_U8P; avcodec_get_frame_defaults(&esc->frame); avctx->coded_frame = &esc->frame; return 0; }