| 77 | } DSTContext; |
| 78 | |
| 79 | static av_cold int decode_init(AVCodecContext *avctx) |
| 80 | { |
| 81 | DSTContext *s = avctx->priv_data; |
| 82 | int i; |
| 83 | |
| 84 | if (avctx->ch_layout.nb_channels > DST_MAX_CHANNELS) { |
| 85 | avpriv_request_sample(avctx, "Channel count %d", avctx->ch_layout.nb_channels); |
| 86 | return AVERROR_PATCHWELCOME; |
| 87 | } |
| 88 | |
| 89 | // the sample rate is only allowed to be 64,128,256 * 44100 by ISO/IEC 14496-3:2005(E) |
| 90 | // We are a bit more tolerant here, but this check is needed to bound the size and duration |
| 91 | if (avctx->sample_rate > 512 * 44100) |
| 92 | return AVERROR_INVALIDDATA; |
| 93 | |
| 94 | |
| 95 | if (DST_SAMPLES_PER_FRAME(avctx->sample_rate) & 7) { |
| 96 | return AVERROR_PATCHWELCOME; |
| 97 | } |
| 98 | |
| 99 | avctx->sample_fmt = AV_SAMPLE_FMT_FLT; |
| 100 | |
| 101 | for (i = 0; i < avctx->ch_layout.nb_channels; i++) |
| 102 | memset(s->dsdctx[i].buf, 0x69, sizeof(s->dsdctx[i].buf)); |
| 103 | |
| 104 | ff_init_dsd_data(); |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int read_map(GetBitContext *gb, Table *t, unsigned int map[DST_MAX_CHANNELS], int channels) |
| 110 | { |
nothing calls this directly
no test coverage detected