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
37 static int nuv_probe(AVProbeData *p) {
40 if (!memcmp(p->buf, "NuppelVideo", 12))
41 return AVPROBE_SCORE_MAX;
42 if (!memcmp(p->buf, "MythTVVideo", 12))
43 return AVPROBE_SCORE_MAX;
47 //! little macro to sanitize packet size
48 #define PKTSIZE(s) (s & 0xffffff)
51 * \brief read until we found all data needed for decoding
52 * \param vst video stream of which to change parameters
53 * \param ast video stream of which to change parameters
54 * \param myth set if this is a MythTVVideo format file
55 * \return 1 if all required codec data was found
57 static int get_codec_data(ByteIOContext *pb, AVStream *vst,
58 AVStream *ast, int myth) {
59 frametype_t frametype;
61 return 1; // no codec data needed
62 while (!url_feof(pb)) {
64 frametype = get_byte(pb);
67 subtype = get_byte(pb);
69 size = PKTSIZE(get_le32(pb));
70 if (vst && subtype == 'R') {
71 vst->codec->extradata_size = size;
72 vst->codec->extradata = av_malloc(size);
73 get_buffer(pb, vst->codec->extradata, size);
81 size = PKTSIZE(get_le32(pb));
84 get_le32(pb); // version
86 vst->codec->codec_tag = get_le32(pb);
87 vst->codec->codec_id =
88 codec_get_id(codec_bmp_tags, vst->codec->codec_tag);
93 ast->codec->codec_tag = get_le32(pb);
94 ast->codec->sample_rate = get_le32(pb);
95 ast->codec->bits_per_sample = get_le32(pb);
96 ast->codec->channels = get_le32(pb);
97 ast->codec->codec_id =
98 wav_codec_get_id(ast->codec->codec_tag,
99 ast->codec->bits_per_sample);
101 url_fskip(pb, 4 * 4);
111 size = PKTSIZE(get_le32(pb));
119 static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
120 NUVContext *ctx = (NUVContext *)s->priv_data;
121 ByteIOContext *pb = &s->pb;
122 char id_string[12], version_string[5];
124 int is_mythtv, width, height, v_packs, a_packs;
126 AVStream *vst = NULL, *ast = NULL;
127 get_buffer(pb, id_string, 12);
128 is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
129 get_buffer(pb, version_string, 5);
130 url_fskip(pb, 3); // padding
131 width = get_le32(pb);
132 height = get_le32(pb);
133 get_le32(pb); // unused, "desiredwidth"
134 get_le32(pb); // unused, "desiredheight"
135 get_byte(pb); // 'P' == progressive, 'I' == interlaced
136 url_fskip(pb, 3); // padding
137 aspect = av_int2dbl(get_le64(pb));
138 fps = av_int2dbl(get_le64(pb));
140 // number of packets per stream type, -1 means unknown, e.g. streaming
141 v_packs = get_le32(pb);
142 a_packs = get_le32(pb);
143 get_le32(pb); // text
145 get_le32(pb); // keyframe distance (?)
148 ctx->v_id = stream_nr++;
149 vst = av_new_stream(s, ctx->v_id);
150 vst->codec->codec_type = CODEC_TYPE_VIDEO;
151 vst->codec->codec_id = CODEC_ID_NUV;
152 vst->codec->codec_tag = MKTAG('R', 'J', 'P', 'G');
153 vst->codec->width = width;
154 vst->codec->height = height;
155 vst->codec->bits_per_sample = 10;
156 vst->codec->sample_aspect_ratio = av_d2q(aspect, 10000);
157 vst->r_frame_rate = av_d2q(fps, 60000);
158 av_set_pts_info(vst, 32, 1, 1000);
163 ctx->a_id = stream_nr++;
164 ast = av_new_stream(s, ctx->a_id);
165 ast->codec->codec_type = CODEC_TYPE_AUDIO;
166 ast->codec->codec_id = CODEC_ID_PCM_S16LE;
167 ast->codec->channels = 2;
168 ast->codec->sample_rate = 44100;
169 ast->codec->bit_rate = 2 * 2 * 44100 * 8;
170 ast->codec->block_align = 2 * 2;
171 ast->codec->bits_per_sample = 16;
172 av_set_pts_info(ast, 32, 1, 1000);
176 get_codec_data(pb, vst, ast, is_mythtv);
182 static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
183 NUVContext *ctx = (NUVContext *)s->priv_data;
184 ByteIOContext *pb = &s->pb;
185 uint8_t hdr[HDRSIZE];
186 frametype_t frametype;
188 while (!url_feof(pb)) {
189 ret = get_buffer(pb, hdr, HDRSIZE);
191 return ret ? ret : -1;
193 size = PKTSIZE(AV_RL32(&hdr[8]));
198 av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
202 ret = av_new_packet(pkt, HDRSIZE + size);
205 pkt->pos = url_ftell(pb);
206 pkt->pts = AV_RL32(&hdr[4]);
207 pkt->stream_index = ctx->v_id;
208 memcpy(pkt->data, hdr, HDRSIZE);
209 ret = get_buffer(pb, pkt->data + HDRSIZE, size);
213 av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
217 ret = av_get_packet(pb, pkt, size);
218 pkt->pts = AV_RL32(&hdr[4]);
219 pkt->stream_index = ctx->a_id;
222 // contains no data, size value is invalid
232 AVInputFormat nuv_demuxer = {
234 "NuppelVideo format",