3 * Copyright (c) 2006 Reimar Doeffinger.
5 * This file is part of FFmpeg.
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.
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.
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
38 static int nuv_probe(AVProbeData *p) {
39 if (!memcmp(p->buf, "NuppelVideo", 12))
40 return AVPROBE_SCORE_MAX;
41 if (!memcmp(p->buf, "MythTVVideo", 12))
42 return AVPROBE_SCORE_MAX;
46 //! little macro to sanitize packet size
47 #define PKTSIZE(s) (s & 0xffffff)
50 * \brief read until we found all data needed for decoding
51 * \param vst video stream of which to change parameters
52 * \param ast video stream of which to change parameters
53 * \param myth set if this is a MythTVVideo format file
54 * \return 1 if all required codec data was found
56 static int get_codec_data(ByteIOContext *pb, AVStream *vst,
57 AVStream *ast, int myth) {
58 frametype_t frametype;
60 return 1; // no codec data needed
61 while (!url_feof(pb)) {
63 frametype = get_byte(pb);
66 subtype = get_byte(pb);
68 size = PKTSIZE(get_le32(pb));
69 if (vst && subtype == 'R') {
70 vst->codec->extradata_size = size;
71 vst->codec->extradata = av_malloc(size);
72 get_buffer(pb, vst->codec->extradata, size);
80 size = PKTSIZE(get_le32(pb));
83 get_le32(pb); // version
85 vst->codec->codec_tag = get_le32(pb);
86 vst->codec->codec_id =
87 codec_get_id(codec_bmp_tags, vst->codec->codec_tag);
88 if (vst->codec->codec_tag == MKTAG('R', 'J', 'P', 'G'))
89 vst->codec->codec_id = CODEC_ID_NUV;
94 ast->codec->codec_tag = get_le32(pb);
95 ast->codec->sample_rate = get_le32(pb);
96 ast->codec->bits_per_coded_sample = get_le32(pb);
97 ast->codec->channels = get_le32(pb);
98 ast->codec->codec_id =
99 wav_codec_get_id(ast->codec->codec_tag,
100 ast->codec->bits_per_coded_sample);
101 ast->need_parsing = AVSTREAM_PARSE_FULL;
103 url_fskip(pb, 4 * 4);
113 size = PKTSIZE(get_le32(pb));
121 static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
122 NUVContext *ctx = s->priv_data;
123 ByteIOContext *pb = s->pb;
124 char id_string[12], version_string[5];
126 int is_mythtv, width, height, v_packs, a_packs;
128 AVStream *vst = NULL, *ast = NULL;
129 get_buffer(pb, id_string, 12);
130 is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
131 get_buffer(pb, version_string, 5);
132 url_fskip(pb, 3); // padding
133 width = get_le32(pb);
134 height = get_le32(pb);
135 get_le32(pb); // unused, "desiredwidth"
136 get_le32(pb); // unused, "desiredheight"
137 get_byte(pb); // 'P' == progressive, 'I' == interlaced
138 url_fskip(pb, 3); // padding
139 aspect = av_int2dbl(get_le64(pb));
140 if (aspect > 0.9999 && aspect < 1.0001)
142 fps = av_int2dbl(get_le64(pb));
144 // number of packets per stream type, -1 means unknown, e.g. streaming
145 v_packs = get_le32(pb);
146 a_packs = get_le32(pb);
147 get_le32(pb); // text
149 get_le32(pb); // keyframe distance (?)
152 ctx->v_id = stream_nr++;
153 vst = av_new_stream(s, ctx->v_id);
155 return AVERROR(ENOMEM);
156 vst->codec->codec_type = CODEC_TYPE_VIDEO;
157 vst->codec->codec_id = CODEC_ID_NUV;
158 vst->codec->width = width;
159 vst->codec->height = height;
160 vst->codec->bits_per_coded_sample = 10;
161 vst->sample_aspect_ratio = av_d2q(aspect * height / width, 10000);
162 vst->r_frame_rate = av_d2q(fps, 60000);
163 av_set_pts_info(vst, 32, 1, 1000);
168 ctx->a_id = stream_nr++;
169 ast = av_new_stream(s, ctx->a_id);
171 return AVERROR(ENOMEM);
172 ast->codec->codec_type = CODEC_TYPE_AUDIO;
173 ast->codec->codec_id = CODEC_ID_PCM_S16LE;
174 ast->codec->channels = 2;
175 ast->codec->sample_rate = 44100;
176 ast->codec->bit_rate = 2 * 2 * 44100 * 8;
177 ast->codec->block_align = 2 * 2;
178 ast->codec->bits_per_coded_sample = 16;
179 av_set_pts_info(ast, 32, 1, 1000);
183 get_codec_data(pb, vst, ast, is_mythtv);
184 ctx->rtjpg_video = vst && vst->codec->codec_id == CODEC_ID_NUV;
190 static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
191 NUVContext *ctx = s->priv_data;
192 ByteIOContext *pb = s->pb;
193 uint8_t hdr[HDRSIZE];
194 frametype_t frametype;
196 while (!url_feof(pb)) {
197 int copyhdrsize = ctx->rtjpg_video ? HDRSIZE : 0;
198 ret = get_buffer(pb, hdr, HDRSIZE);
200 return ret ? ret : -1;
202 size = PKTSIZE(AV_RL32(&hdr[8]));
205 if (!ctx->rtjpg_video) {
211 av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
215 ret = av_new_packet(pkt, copyhdrsize + size);
218 pkt->pos = url_ftell(pb) - copyhdrsize;
219 pkt->pts = AV_RL32(&hdr[4]);
220 pkt->stream_index = ctx->v_id;
221 memcpy(pkt->data, hdr, copyhdrsize);
222 ret = get_buffer(pb, pkt->data + copyhdrsize, size);
226 av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
230 ret = av_get_packet(pb, pkt, size);
231 pkt->pts = AV_RL32(&hdr[4]);
232 pkt->stream_index = ctx->a_id;
235 // contains no data, size value is invalid
245 AVInputFormat nuv_demuxer = {
247 NULL_IF_CONFIG_SMALL("NuppelVideo format"),