diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/c93.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/c93.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/contrib/ffmpeg/libavformat/c93.c b/contrib/ffmpeg/libavformat/c93.c deleted file mode 100644 index 996012f6e..000000000 --- a/contrib/ffmpeg/libavformat/c93.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Interplay C93 demuxer - * Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com> - * - * 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 "avformat.h" -#include "voc.h" - -typedef struct { - uint16_t index; - uint8_t length; - uint8_t frames; -} C93BlockRecord; - -typedef struct { - voc_dec_context_t voc; - - C93BlockRecord block_records[512]; - int current_block; - - uint32_t frame_offsets[32]; - int current_frame; - int next_pkt_is_audio; - - AVStream *audio; -} C93DemuxContext; - -static int probe(AVProbeData *p) -{ - if (p->buf[0] == 0x01 && p->buf[1] == 0x00 && - p->buf[4] == 0x01 + p->buf[2] && - p->buf[8] == p->buf[4] + p->buf[6] && - p->buf[12] == p->buf[8] + p->buf[10]) - return AVPROBE_SCORE_MAX; - - return 0; -} - -static int read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - AVStream *video; - ByteIOContext *pb = s->pb; - C93DemuxContext *c93 = s->priv_data; - int i; - int framecount = 0; - - for (i = 0; i < 512; i++) { - c93->block_records[i].index = get_le16(pb); - c93->block_records[i].length = get_byte(pb); - c93->block_records[i].frames = get_byte(pb); - if (c93->block_records[i].frames > 32) { - av_log(s, AV_LOG_ERROR, "too many frames in block\n"); - return AVERROR_INVALIDDATA; - } - framecount += c93->block_records[i].frames; - } - - /* Audio streams are added if audio packets are found */ - s->ctx_flags |= AVFMTCTX_NOHEADER; - - video = av_new_stream(s, 0); - if (!video) - return AVERROR(ENOMEM); - - video->codec->codec_type = CODEC_TYPE_VIDEO; - video->codec->codec_id = CODEC_ID_C93; - video->codec->width = 320; - video->codec->height = 192; - /* 4:3 320x200 with 8 empty lines */ - video->codec->sample_aspect_ratio = (AVRational) { 5, 6 }; - video->time_base = (AVRational) { 2, 25 }; - video->nb_frames = framecount; - video->duration = framecount; - video->start_time = 0; - - c93->current_block = 0; - c93->current_frame = 0; - c93->next_pkt_is_audio = 0; - return 0; -} - -#define C93_HAS_PALETTE 0x01 -#define C93_FIRST_FRAME 0x02 - -static int read_packet(AVFormatContext *s, AVPacket *pkt) -{ - ByteIOContext *pb = s->pb; - C93DemuxContext *c93 = s->priv_data; - C93BlockRecord *br = &c93->block_records[c93->current_block]; - int datasize; - int ret, i; - - if (c93->next_pkt_is_audio) { - c93->current_frame++; - c93->next_pkt_is_audio = 0; - datasize = get_le16(pb); - if (datasize > 42) { - if (!c93->audio) { - c93->audio = av_new_stream(s, 1); - if (!c93->audio) - return AVERROR(ENOMEM); - c93->audio->codec->codec_type = CODEC_TYPE_AUDIO; - } - url_fskip(pb, 26); /* VOC header */ - ret = voc_get_packet(s, pkt, c93->audio, datasize - 26); - if (ret > 0) { - pkt->stream_index = 1; - pkt->flags |= PKT_FLAG_KEY; - return ret; - } - } - } - if (c93->current_frame >= br->frames) { - if (c93->current_block >= 511 || !br[1].length) - return AVERROR(EIO); - br++; - c93->current_block++; - c93->current_frame = 0; - } - - if (c93->current_frame == 0) { - url_fseek(pb, br->index * 2048, SEEK_SET); - for (i = 0; i < 32; i++) { - c93->frame_offsets[i] = get_le32(pb); - } - } - - url_fseek(pb,br->index * 2048 + - c93->frame_offsets[c93->current_frame], SEEK_SET); - datasize = get_le16(pb); /* video frame size */ - - ret = av_new_packet(pkt, datasize + 768 + 1); - if (ret < 0) - return ret; - pkt->data[0] = 0; - pkt->size = datasize + 1; - - ret = get_buffer(pb, pkt->data + 1, datasize); - if (ret < datasize) { - ret = AVERROR(EIO); - goto fail; - } - - datasize = get_le16(pb); /* palette size */ - if (datasize) { - if (datasize != 768) { - av_log(s, AV_LOG_ERROR, "invalid palette size %u\n", datasize); - ret = AVERROR_INVALIDDATA; - goto fail; - } - pkt->data[0] |= C93_HAS_PALETTE; - ret = get_buffer(pb, pkt->data + pkt->size, datasize); - if (ret < datasize) { - ret = AVERROR(EIO); - goto fail; - } - pkt->size += 768; - } - pkt->stream_index = 0; - c93->next_pkt_is_audio = 1; - - /* only the first frame is guaranteed to not reference previous frames */ - if (c93->current_block == 0 && c93->current_frame == 0) { - pkt->flags |= PKT_FLAG_KEY; - pkt->data[0] |= C93_FIRST_FRAME; - } - return 0; - - fail: - av_free_packet(pkt); - return ret; -} - -AVInputFormat c93_demuxer = { - "c93", - "Interplay C93", - sizeof(C93DemuxContext), - probe, - read_header, - read_packet, -}; |