static int aiff_write_header(AVFormatContext *s) { AIFFOutputContext *aiff = s->priv_data; ByteIOContext *pb = &s->pb; AVCodecContext *enc = s->streams[0]->codec; AVExtFloat sample_rate; int coder_len; /* First verify if format is ok */ enc->codec_tag = codec_get_tag(codec_aiff_tags, enc->codec_id); if (!enc->codec_tag) { av_free(aiff); return -1; } coder_len = strlen(enc->codec->name); /* FORM AIFF header */ put_tag(pb, "FORM"); aiff->form = url_ftell(pb); put_be32(pb, 0); /* file length */ put_tag(pb, "AIFC"); /* Version chunk */ put_tag(pb, "FVER"); put_be32(pb, 4); put_be32(pb, 0xA2805140); /* Common chunk */ put_tag(pb, "COMM"); if (coder_len & 1) /* Common chunk is of var size */ put_be32(pb, 23+coder_len); else put_be32(pb, 24+coder_len); put_be16(pb, enc->channels); /* Number of channels */ aiff->frames = url_ftell(pb); put_be32(pb, 0); /* Number of frames */ if (!enc->bits_per_sample) enc->bits_per_sample = (enc->block_align<<3) / enc->channels; put_be16(pb, enc->bits_per_sample); /* Sample size */ sample_rate = av_dbl2ext((double)enc->sample_rate); put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); put_le32(pb, enc->codec_tag); if (coder_len & 1) { put_byte(pb, coder_len); put_buffer(pb, (uint8_t*)enc->codec->name, coder_len); } else { put_byte(pb, coder_len+1); put_buffer(pb, (uint8_t*)enc->codec->name, coder_len); put_byte(pb, 0); } /* Sound data chunk */ put_tag(pb, "SSND"); aiff->ssnd = url_ftell(pb); /* Sound chunk size */ put_be32(pb, 0); /* Sound samples data size */ put_be32(pb, 0); /* Data offset */ put_be32(pb, 0); /* Block-size (block align) */ av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); /* Data is starting here */ put_flush_packet(pb); return 0; }
static int aiff_write_header(AVFormatContext *s) { AIFFOutputContext *aiff = s->priv_data; AVIOContext *pb = s->pb; AVCodecContext *enc = s->streams[0]->codec; AVExtFloat sample_rate; int aifc = 0; /* First verify if format is ok */ if (!enc->codec_tag) return -1; if (enc->codec_tag != MKTAG('N','O','N','E')) aifc = 1; /* FORM AIFF header */ ffio_wfourcc(pb, "FORM"); aiff->form = avio_tell(pb); avio_wb32(pb, 0); /* file length */ ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF"); if (aifc) { // compressed audio enc->bits_per_coded_sample = 16; if (!enc->block_align) { av_log(s, AV_LOG_ERROR, "block align not set\n"); return -1; } /* Version chunk */ ffio_wfourcc(pb, "FVER"); avio_wb32(pb, 4); avio_wb32(pb, 0xA2805140); } if (enc->channels > 2 && enc->channel_layout) { ffio_wfourcc(pb, "CHAN"); avio_wb32(pb, 12); ff_mov_write_chan(pb, enc->channel_layout); } /* Common chunk */ ffio_wfourcc(pb, "COMM"); avio_wb32(pb, aifc ? 24 : 18); /* size */ avio_wb16(pb, enc->channels); /* Number of channels */ aiff->frames = avio_tell(pb); avio_wb32(pb, 0); /* Number of frames */ if (!enc->bits_per_coded_sample) enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id); if (!enc->bits_per_coded_sample) { av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n"); return -1; } if (!enc->block_align) enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3; avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */ sample_rate = av_dbl2ext((double)enc->sample_rate); avio_write(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); if (aifc) { avio_wl32(pb, enc->codec_tag); avio_wb16(pb, 0); } /* Sound data chunk */ ffio_wfourcc(pb, "SSND"); aiff->ssnd = avio_tell(pb); /* Sound chunk size */ avio_wb32(pb, 0); /* Sound samples data size */ avio_wb32(pb, 0); /* Data offset */ avio_wb32(pb, 0); /* Block-size (block align) */ avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); /* Data is starting here */ avio_flush(pb); return 0; }
static int aiff_write_header(AVFormatContext *s) { AIFFOutputContext *aiff = s->priv_data; ByteIOContext *pb = &s->pb; AVCodecContext *enc = s->streams[0]->codec; AVExtFloat sample_rate; int aifc = 0; /* First verify if format is ok */ if (!enc->codec_tag) { return -1; } if (enc->codec_tag != MKTAG('N','O','N','E')) aifc = 1; /* FORM AIFF header */ put_tag(pb, "FORM"); aiff->form = url_ftell(pb); put_be32(pb, 0); /* file length */ put_tag(pb, aifc ? "AIFC" : "AIFF"); if (aifc) { /* Version chunk */ put_tag(pb, "FVER"); put_be32(pb, 4); put_be32(pb, 0xA2805140); } /* Common chunk */ put_tag(pb, "COMM"); put_be32(pb, aifc ? 24 : 18); /* size */ put_be16(pb, enc->channels); /* Number of channels */ aiff->frames = url_ftell(pb); put_be32(pb, 0); /* Number of frames */ if (!enc->bits_per_sample) enc->bits_per_sample = av_get_bits_per_sample(enc->codec_id); if (!enc->bits_per_sample) { av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n"); return -1; } if (!enc->block_align) enc->block_align = (enc->bits_per_sample * enc->channels) >> 3; put_be16(pb, enc->bits_per_sample); /* Sample size */ sample_rate = av_dbl2ext((double)enc->sample_rate); put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); if (aifc) { put_le32(pb, enc->codec_tag); put_be16(pb, 0); } /* Sound data chunk */ put_tag(pb, "SSND"); aiff->ssnd = url_ftell(pb); /* Sound chunk size */ put_be32(pb, 0); /* Sound samples data size */ put_be32(pb, 0); /* Data offset */ put_be32(pb, 0); /* Block-size (block align) */ av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); /* Data is starting here */ put_flush_packet(pb); return 0; }