| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Megalux Frame demuxer | ||
| 3 | * Copyright (c) 2010 Peter Ross <pross@xvid.org> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * Megalux Frame demuxer | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "libavutil/imgutils.h" | ||
| 28 | #include "libavutil/intreadwrite.h" | ||
| 29 | #include "avformat.h" | ||
| 30 | #include "demux.h" | ||
| 31 | |||
| 32 | static const enum AVPixelFormat frm_pix_fmt_tags[] = { | ||
| 33 | AV_PIX_FMT_RGB555, | ||
| 34 | AV_PIX_FMT_RGB0, | ||
| 35 | AV_PIX_FMT_RGB24, | ||
| 36 | AV_PIX_FMT_BGR0, | ||
| 37 | AV_PIX_FMT_BGRA, | ||
| 38 | }; | ||
| 39 | |||
| 40 | typedef struct { | ||
| 41 | int count; | ||
| 42 | } FrmContext; | ||
| 43 | |||
| 44 | 7128 | static int frm_read_probe(const AVProbeData *p) | |
| 45 | { | ||
| 46 |
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7128 | if (p->buf_size > 8 && |
| 47 |
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7128 | p->buf[0] == 'F' && p->buf[1] == 'R' && p->buf[2] == 'M' && |
| 48 |
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1 | AV_RL16(&p->buf[4]) && AV_RL16(&p->buf[6])) |
| 49 | ✗ | return AVPROBE_SCORE_MAX / 4; | |
| 50 | 7128 | return 0; | |
| 51 | } | ||
| 52 | |||
| 53 | ✗ | static int frm_read_header(AVFormatContext *avctx) | |
| 54 | { | ||
| 55 | ✗ | AVIOContext *pb = avctx->pb; | |
| 56 | ✗ | AVStream *st = avformat_new_stream(avctx, 0); | |
| 57 | unsigned idx; | ||
| 58 | |||
| 59 | ✗ | if (!st) | |
| 60 | ✗ | return AVERROR(ENOMEM); | |
| 61 | |||
| 62 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 63 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; | |
| 64 | ✗ | avio_skip(pb, 3); | |
| 65 | |||
| 66 | ✗ | idx = avio_r8(pb) - 1; | |
| 67 | ✗ | if (idx >= FF_ARRAY_ELEMS(frm_pix_fmt_tags)) | |
| 68 | ✗ | return AVERROR_INVALIDDATA; | |
| 69 | ✗ | st->codecpar->format = frm_pix_fmt_tags[idx]; | |
| 70 | |||
| 71 | ✗ | st->codecpar->codec_tag = 0; | |
| 72 | ✗ | st->codecpar->width = avio_rl16(pb); | |
| 73 | ✗ | st->codecpar->height = avio_rl16(pb); | |
| 74 | ✗ | return 0; | |
| 75 | } | ||
| 76 | |||
| 77 | ✗ | static int frm_read_packet(AVFormatContext *avctx, AVPacket *pkt) | |
| 78 | { | ||
| 79 | ✗ | FrmContext *s = avctx->priv_data; | |
| 80 | ✗ | AVCodecParameters *par = avctx->streams[0]->codecpar; | |
| 81 | int packet_size, ret; | ||
| 82 | |||
| 83 | ✗ | if (s->count) | |
| 84 | ✗ | return AVERROR_EOF; | |
| 85 | |||
| 86 | ✗ | packet_size = av_image_get_buffer_size(par->format, par->width, par->height, 1); | |
| 87 | ✗ | if (packet_size < 0) | |
| 88 | ✗ | return AVERROR_INVALIDDATA; | |
| 89 | |||
| 90 | ✗ | ret = av_get_packet(avctx->pb, pkt, packet_size); | |
| 91 | ✗ | if (ret < 0) | |
| 92 | ✗ | return ret; | |
| 93 | |||
| 94 | ✗ | if (par->format == AV_PIX_FMT_BGRA) { | |
| 95 | int i; | ||
| 96 | ✗ | for (i = 3; i + 1 <= pkt->size; i += 4) | |
| 97 | ✗ | pkt->data[i] = 0xFF - pkt->data[i]; | |
| 98 | } | ||
| 99 | |||
| 100 | ✗ | pkt->stream_index = 0; | |
| 101 | ✗ | s->count++; | |
| 102 | |||
| 103 | ✗ | return 0; | |
| 104 | } | ||
| 105 | |||
| 106 | const FFInputFormat ff_frm_demuxer = { | ||
| 107 | .p.name = "frm", | ||
| 108 | .p.long_name = NULL_IF_CONFIG_SMALL("Megalux Frame"), | ||
| 109 | .priv_data_size = sizeof(FrmContext), | ||
| 110 | .read_probe = frm_read_probe, | ||
| 111 | .read_header = frm_read_header, | ||
| 112 | .read_packet = frm_read_packet, | ||
| 113 | }; | ||
| 114 |