From 7f0e7fc9e2e668a535dec5a5c70aa95c7788700c Mon Sep 17 00:00:00 2001 From: James Almer Date: Thu, 29 Nov 2012 13:12:33 -0300 Subject: ast: Rename ast.c -> astdec.c Signed-off-by: James Almer --- libavformat/ast.c | 127 ------------------------------------------------------ 1 file changed, 127 deletions(-) delete mode 100644 libavformat/ast.c (limited to 'libavformat/ast.c') diff --git a/libavformat/ast.c b/libavformat/ast.c deleted file mode 100644 index 5f69f47d44..0000000000 --- a/libavformat/ast.c +++ /dev/null @@ -1,127 +0,0 @@ -/* - * AST demuxer - * Copyright (c) 2012 Paul B Mahol - * - * This file is part of FFmpeg. - * - * FFmpeg 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, - * 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 - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/intreadwrite.h" -#include "avformat.h" -#include "internal.h" - -static int ast_probe(AVProbeData *p) -{ - if (AV_RL32(p->buf) == MKTAG('S','T','R','M') && - AV_RB16(p->buf + 10) && - AV_RB16(p->buf + 12) && - AV_RB32(p->buf + 16)) - return AVPROBE_SCORE_MAX / 3 * 2; - return 0; -} - -static int ast_read_header(AVFormatContext *s) -{ - int codec, depth; - AVStream *st; - - st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - - avio_skip(s->pb, 8); - codec = avio_rb16(s->pb); - switch (codec) { - case 0: - st->codec->codec_id = AV_CODEC_ID_ADPCM_AFC; - break; - case 1: - st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR; - break; - default: - av_log(s, AV_LOG_ERROR, "unsupported codec %d\n", codec); - } - - depth = avio_rb16(s->pb); - if (depth != 16) { - av_log_ask_for_sample(s, "unsupported depth %d\n", depth); - return AVERROR_INVALIDDATA; - } - - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->channels = avio_rb16(s->pb); - if (!st->codec->channels) - return AVERROR_INVALIDDATA; - - if (st->codec->channels == 2) - st->codec->channel_layout = AV_CH_LAYOUT_STEREO; - else if (st->codec->channels == 4) - st->codec->channel_layout = AV_CH_LAYOUT_4POINT0; - - avio_skip(s->pb, 2); - st->codec->sample_rate = avio_rb32(s->pb); - if (st->codec->sample_rate <= 0) - return AVERROR_INVALIDDATA; - st->start_time = 0; - st->duration = avio_rb32(s->pb); - avio_skip(s->pb, 40); - avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); - - return 0; -} - -static int ast_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - uint32_t type, size; - int64_t pos; - int ret; - - if (url_feof(s->pb)) - return AVERROR_EOF; - - pos = avio_tell(s->pb); - type = avio_rl32(s->pb); - size = avio_rb32(s->pb); - if (size > INT_MAX / s->streams[0]->codec->channels) - return AVERROR_INVALIDDATA; - - size *= s->streams[0]->codec->channels; - if ((ret = avio_skip(s->pb, 24)) < 0) // padding - return ret; - - if (type == MKTAG('B','L','C','K')) { - ret = av_get_packet(s->pb, pkt, size); - pkt->stream_index = 0; - pkt->pos = pos; - } else { - av_log(s, AV_LOG_ERROR, "unknown chunk %x\n", type); - avio_skip(s->pb, size); - ret = AVERROR_INVALIDDATA; - } - - return ret; -} - -AVInputFormat ff_ast_demuxer = { - .name = "ast", - .long_name = NULL_IF_CONFIG_SMALL("AST (Audio Stream)"), - .read_probe = ast_probe, - .read_header = ast_read_header, - .read_packet = ast_read_packet, - .extensions = "ast", - .flags = AVFMT_GENERIC_INDEX, -}; -- cgit v1.2.3