* IEC 61937 demuxer
* Copyright (c) 2010 Anssi Hannula <anssi.hannula at iki.fi>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static int spdif_get_offset_and_codec(AVFormatContext *s,
enum IEC61937DataType data_type,
const char *buf, int *offset,
- enum CodecID *codec)
+ enum AVCodecID *codec)
{
AACADTSHeaderInfo aac_hdr;
GetBitContext gbc;
switch (data_type & 0xff) {
case IEC61937_AC3:
*offset = AC3_FRAME_SIZE << 2;
- *codec = CODEC_ID_AC3;
+ *codec = AV_CODEC_ID_AC3;
break;
case IEC61937_MPEG1_LAYER1:
*offset = spdif_mpeg_pkt_offset[1][0];
- *codec = CODEC_ID_MP1;
+ *codec = AV_CODEC_ID_MP1;
break;
case IEC61937_MPEG1_LAYER23:
*offset = spdif_mpeg_pkt_offset[1][0];
- *codec = CODEC_ID_MP3;
+ *codec = AV_CODEC_ID_MP3;
break;
case IEC61937_MPEG2_EXT:
*offset = 4608;
- *codec = CODEC_ID_MP3;
+ *codec = AV_CODEC_ID_MP3;
break;
case IEC61937_MPEG2_AAC:
init_get_bits(&gbc, buf, AAC_ADTS_HEADER_SIZE * 8);
- if (ff_aac_parse_header(&gbc, &aac_hdr)) {
+ if (avpriv_aac_parse_header(&gbc, &aac_hdr)) {
if (s) /* be silent during a probe */
av_log(s, AV_LOG_ERROR, "Invalid AAC packet in IEC 61937\n");
return AVERROR_INVALIDDATA;
}
*offset = aac_hdr.samples << 2;
- *codec = CODEC_ID_AAC;
+ *codec = AV_CODEC_ID_AAC;
break;
case IEC61937_MPEG2_LAYER1_LSF:
*offset = spdif_mpeg_pkt_offset[0][0];
- *codec = CODEC_ID_MP1;
+ *codec = AV_CODEC_ID_MP1;
break;
case IEC61937_MPEG2_LAYER2_LSF:
*offset = spdif_mpeg_pkt_offset[0][1];
- *codec = CODEC_ID_MP2;
+ *codec = AV_CODEC_ID_MP2;
break;
case IEC61937_MPEG2_LAYER3_LSF:
*offset = spdif_mpeg_pkt_offset[0][2];
- *codec = CODEC_ID_MP3;
+ *codec = AV_CODEC_ID_MP3;
break;
case IEC61937_DTS1:
*offset = 2048;
- *codec = CODEC_ID_DTS;
+ *codec = AV_CODEC_ID_DTS;
break;
case IEC61937_DTS2:
*offset = 4096;
- *codec = CODEC_ID_DTS;
+ *codec = AV_CODEC_ID_DTS;
break;
case IEC61937_DTS3:
*offset = 8192;
- *codec = CODEC_ID_DTS;
+ *codec = AV_CODEC_ID_DTS;
break;
default:
if (s) { /* be silent during a probe */
- av_log(s, AV_LOG_WARNING, "Data type 0x%04x", data_type);
- av_log_missing_feature(s, " in IEC 61937 is", 1);
+ avpriv_request_sample(s, "Data type 0x%04x in IEC 61937",
+ data_type);
}
return AVERROR_PATCHWELCOME;
}
int sync_codes = 0;
int consecutive_codes = 0;
int offset;
- enum CodecID codec;
+ enum AVCodecID codec;
for (; buf < probe_end; buf++) {
state = (state << 8) | *buf;
if (sync_codes >= 6)
/* good amount of sync codes but with unexpected offsets */
- return AVPROBE_SCORE_MAX / 2;
+ return AVPROBE_SCORE_EXTENSION;
/* some sync codes were found */
- return AVPROBE_SCORE_MAX / 8;
+ return AVPROBE_SCORE_EXTENSION / 4;
}
-static int spdif_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int spdif_read_header(AVFormatContext *s)
{
s->ctx_flags |= AVFMTCTX_NOHEADER;
return 0;
static int spdif_read_packet(AVFormatContext *s, AVPacket *pkt)
{
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
enum IEC61937DataType data_type;
- enum CodecID codec_id;
+ enum AVCodecID codec_id;
uint32_t state = 0;
int pkt_size_bits, offset, ret;
while (state != (AV_BSWAP16C(SYNCWORD1) << 16 | AV_BSWAP16C(SYNCWORD2))) {
- state = (state << 8) | get_byte(pb);
- if (url_feof(pb))
+ state = (state << 8) | avio_r8(pb);
+ if (pb->eof_reached)
return AVERROR_EOF;
}
- data_type = get_le16(pb);
- pkt_size_bits = get_le16(pb);
+ data_type = avio_rl16(pb);
+ pkt_size_bits = avio_rl16(pb);
if (pkt_size_bits % 16)
- av_log_ask_for_sample(s, "Packet does not end to a 16-bit boundary.");
+ avpriv_request_sample(s, "Packet not ending at a 16-bit boundary");
ret = av_new_packet(pkt, FFALIGN(pkt_size_bits, 16) >> 3);
if (ret)
return ret;
- pkt->pos = url_ftell(pb) - BURST_HEADER_SIZE;
+ pkt->pos = avio_tell(pb) - BURST_HEADER_SIZE;
- if (get_buffer(pb, pkt->data, pkt->size) < pkt->size) {
- av_free_packet(pkt);
+ if (avio_read(pb, pkt->data, pkt->size) < pkt->size) {
+ av_packet_unref(pkt);
return AVERROR_EOF;
}
ff_spdif_bswap_buf16((uint16_t *)pkt->data, (uint16_t *)pkt->data, pkt->size >> 1);
ret = spdif_get_offset_and_codec(s, data_type, pkt->data,
&offset, &codec_id);
if (ret) {
- av_free_packet(pkt);
+ av_packet_unref(pkt);
return ret;
}
/* skip over the padding to the beginning of the next frame */
- url_fskip(pb, offset - pkt->size - BURST_HEADER_SIZE);
+ avio_skip(pb, offset - pkt->size - BURST_HEADER_SIZE);
if (!s->nb_streams) {
/* first packet, create a stream */
- AVStream *st = av_new_stream(s, 0);
+ AVStream *st = avformat_new_stream(s, NULL);
if (!st) {
- av_free_packet(pkt);
+ av_packet_unref(pkt);
return AVERROR(ENOMEM);
}
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = codec_id;
- } else if (codec_id != s->streams[0]->codec->codec_id) {
- av_log_missing_feature(s, "codec change in IEC 61937", 0);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = codec_id;
+ } else if (codec_id != s->streams[0]->codecpar->codec_id) {
+ avpriv_report_missing_feature(s, "Codec change in IEC 61937");
return AVERROR_PATCHWELCOME;
}
- if (!s->bit_rate && s->streams[0]->codec->sample_rate)
+ if (!s->bit_rate && s->streams[0]->codecpar->sample_rate)
/* stream bitrate matches 16-bit stereo PCM bitrate for currently
supported codecs */
- s->bit_rate = 2 * 16 * s->streams[0]->codec->sample_rate;
+ s->bit_rate = 2 * 16 * s->streams[0]->codecpar->sample_rate;
return 0;
}
-AVInputFormat spdif_demuxer = {
- "spdif",
- NULL_IF_CONFIG_SMALL("IEC 61937 (compressed data in S/PDIF)"),
- 0,
- spdif_probe,
- spdif_read_header,
- spdif_read_packet,
- .flags = AVFMT_GENERIC_INDEX,
+AVInputFormat ff_spdif_demuxer = {
+ .name = "spdif",
+ .long_name = NULL_IF_CONFIG_SMALL("IEC 61937 (compressed data in S/PDIF)"),
+ .read_probe = spdif_probe,
+ .read_header = spdif_read_header,
+ .read_packet = spdif_read_packet,
+ .flags = AVFMT_GENERIC_INDEX,
};
projects / ffmpeg / blobdiff