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_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_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
fps = av_int2dbl(get_le64(pb));
142
// number of packets per stream type, -1 means unknown, e.g. streaming
143
v_packs = get_le32(pb);
144
a_packs = get_le32(pb);
145
get_le32(pb); // text
147
get_le32(pb); // keyframe distance (?)
150
ctx->v_id = stream_nr++;
151
vst = av_new_stream(s, ctx->v_id);
152
vst->codec->codec_type = CODEC_TYPE_VIDEO;
153
vst->codec->codec_id = CODEC_ID_NUV;
154
vst->codec->width = width;
155
vst->codec->height = height;
156
vst->codec->bits_per_sample = 10;
157
vst->codec->sample_aspect_ratio = av_d2q(aspect, 10000);
158
vst->r_frame_rate = av_d2q(fps, 60000);
159
av_set_pts_info(vst, 32, 1, 1000);
164
ctx->a_id = stream_nr++;
165
ast = av_new_stream(s, ctx->a_id);
166
ast->codec->codec_type = CODEC_TYPE_AUDIO;
167
ast->codec->codec_id = CODEC_ID_PCM_S16LE;
168
ast->codec->channels = 2;
169
ast->codec->sample_rate = 44100;
170
ast->codec->bit_rate = 2 * 2 * 44100 * 8;
171
ast->codec->block_align = 2 * 2;
172
ast->codec->bits_per_sample = 16;
173
av_set_pts_info(ast, 32, 1, 1000);
177
get_codec_data(pb, vst, ast, is_mythtv);
178
ctx->rtjpg_video = vst->codec->codec_id == CODEC_ID_NUV;
184
static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
185
NUVContext *ctx = s->priv_data;
186
ByteIOContext *pb = &s->pb;
187
uint8_t hdr[HDRSIZE];
188
frametype_t frametype;
190
while (!url_feof(pb)) {
191
int copyhdrsize = ctx->rtjpg_video ? HDRSIZE : 0;
192
ret = get_buffer(pb, hdr, HDRSIZE);
194
return ret ? ret : -1;
196
size = PKTSIZE(AV_RL32(&hdr[8]));
199
if (!ctx->rtjpg_video) {
205
av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
209
ret = av_new_packet(pkt, copyhdrsize + size);
212
pkt->pos = url_ftell(pb) - copyhdrsize;
213
pkt->pts = AV_RL32(&hdr[4]);
214
pkt->stream_index = ctx->v_id;
215
memcpy(pkt->data, hdr, copyhdrsize);
216
ret = get_buffer(pb, pkt->data + copyhdrsize, size);
220
av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
224
ret = av_get_packet(pb, pkt, size);
225
pkt->pts = AV_RL32(&hdr[4]);
226
pkt->stream_index = ctx->a_id;
229
// contains no data, size value is invalid
239
AVInputFormat nuv_demuxer = {
241
"NuppelVideo format",