100l trocadero: call emms_c() after doing decoding with SIMD in APE decoder
[libav.git] / libavformat / rtmppkt.c
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1/*
2 * RTMP input format
3 * Copyright (c) 2009 Kostya Shishkov
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#include "libavcodec/bytestream.h"
23#include "libavutil/avstring.h"
24#include "avformat.h"
25
26#include "rtmppkt.h"
27#include "flv.h"
28
29void ff_amf_write_bool(uint8_t **dst, int val)
30{
31 bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
32 bytestream_put_byte(dst, val);
33}
34
35void ff_amf_write_number(uint8_t **dst, double val)
36{
37 bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
38 bytestream_put_be64(dst, av_dbl2int(val));
39}
40
41void ff_amf_write_string(uint8_t **dst, const char *str)
42{
43 bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
44 bytestream_put_be16(dst, strlen(str));
45 bytestream_put_buffer(dst, str, strlen(str));
46}
47
48void ff_amf_write_null(uint8_t **dst)
49{
50 bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
51}
52
53void ff_amf_write_object_start(uint8_t **dst)
54{
55 bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
56}
57
58void ff_amf_write_field_name(uint8_t **dst, const char *str)
59{
60 bytestream_put_be16(dst, strlen(str));
61 bytestream_put_buffer(dst, str, strlen(str));
62}
63
64void ff_amf_write_object_end(uint8_t **dst)
65{
66 /* first two bytes are field name length = 0,
67 * AMF object should end with it and end marker
68 */
69 bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
70}
71
72int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
73 int chunk_size, RTMPPacket *prev_pkt)
74{
75 uint8_t hdr, t, buf[16];
76 int channel_id, timestamp, data_size, offset = 0;
77 uint32_t extra = 0;
0f87b771 78 enum RTMPPacketType type;
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79
80 if (url_read(h, &hdr, 1) != 1)
81 return AVERROR(EIO);
82 channel_id = hdr & 0x3F;
83
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84 if (channel_id < 2) { //special case for channel number >= 64
85 buf[1] = 0;
86 if (url_read_complete(h, buf, channel_id + 1) != channel_id + 1)
87 return AVERROR(EIO);
88 channel_id = AV_RL16(buf) + 64;
89 }
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90 data_size = prev_pkt[channel_id].data_size;
91 type = prev_pkt[channel_id].type;
92 extra = prev_pkt[channel_id].extra;
93
94 hdr >>= 6;
95 if (hdr == RTMP_PS_ONEBYTE) {
a352b605 96 timestamp = prev_pkt[channel_id].ts_delta;
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97 } else {
98 if (url_read_complete(h, buf, 3) != 3)
99 return AVERROR(EIO);
100 timestamp = AV_RB24(buf);
101 if (hdr != RTMP_PS_FOURBYTES) {
102 if (url_read_complete(h, buf, 3) != 3)
103 return AVERROR(EIO);
104 data_size = AV_RB24(buf);
1ab21f19 105 if (url_read_complete(h, buf, 1) != 1)
9fd6b843 106 return AVERROR(EIO);
1ab21f19 107 type = buf[0];
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108 if (hdr == RTMP_PS_TWELVEBYTES) {
109 if (url_read_complete(h, buf, 4) != 4)
110 return AVERROR(EIO);
111 extra = AV_RL32(buf);
112 }
113 }
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114 if (timestamp == 0xFFFFFF) {
115 if (url_read_complete(h, buf, 4) != 4)
116 return AVERROR(EIO);
117 timestamp = AV_RB32(buf);
118 }
9fd6b843 119 }
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120 if (hdr != RTMP_PS_TWELVEBYTES)
121 timestamp += prev_pkt[channel_id].timestamp;
122
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123 if (ff_rtmp_packet_create(p, channel_id, type, timestamp, data_size))
124 return -1;
125 p->extra = extra;
126 // save history
127 prev_pkt[channel_id].channel_id = channel_id;
128 prev_pkt[channel_id].type = type;
129 prev_pkt[channel_id].data_size = data_size;
a352b605 130 prev_pkt[channel_id].ts_delta = timestamp - prev_pkt[channel_id].timestamp;
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131 prev_pkt[channel_id].timestamp = timestamp;
132 prev_pkt[channel_id].extra = extra;
133 while (data_size > 0) {
134 int toread = FFMIN(data_size, chunk_size);
135 if (url_read_complete(h, p->data + offset, toread) != toread) {
136 ff_rtmp_packet_destroy(p);
137 return AVERROR(EIO);
138 }
139 data_size -= chunk_size;
140 offset += chunk_size;
141 if (data_size > 0) {
142 url_read_complete(h, &t, 1); //marker
143 if (t != (0xC0 + channel_id))
144 return -1;
145 }
146 }
147 return 0;
148}
149
150int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
151 int chunk_size, RTMPPacket *prev_pkt)
152{
153 uint8_t pkt_hdr[16], *p = pkt_hdr;
154 int mode = RTMP_PS_TWELVEBYTES;
155 int off = 0;
a352b605 156 pkt->ts_delta = pkt->timestamp - prev_pkt[pkt->channel_id].timestamp;
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157
158 //TODO: header compression
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159 if (pkt->channel_id < 64) {
160 bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
161 } else if (pkt->channel_id < 64 + 256) {
162 bytestream_put_byte(&p, 0 | (mode << 6));
163 bytestream_put_byte(&p, pkt->channel_id - 64);
164 } else {
165 bytestream_put_byte(&p, 1 | (mode << 6));
166 bytestream_put_le16(&p, pkt->channel_id - 64);
167 }
9fd6b843 168 if (mode != RTMP_PS_ONEBYTE) {
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169 uint32_t timestamp = pkt->timestamp;
170 if (mode != RTMP_PS_TWELVEBYTES)
a352b605 171 timestamp = pkt->ts_delta;
817d967d 172 bytestream_put_be24(&p, timestamp >= 0xFFFFFF ? 0xFFFFFF : timestamp);
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173 if (mode != RTMP_PS_FOURBYTES) {
174 bytestream_put_be24(&p, pkt->data_size);
175 bytestream_put_byte(&p, pkt->type);
176 if (mode == RTMP_PS_TWELVEBYTES)
177 bytestream_put_le32(&p, pkt->extra);
178 }
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179 if (timestamp >= 0xFFFFFF)
180 bytestream_put_be32(&p, timestamp);
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181 }
182 url_write(h, pkt_hdr, p-pkt_hdr);
183 while (off < pkt->data_size) {
184 int towrite = FFMIN(chunk_size, pkt->data_size - off);
185 url_write(h, pkt->data + off, towrite);
186 off += towrite;
187 if (off < pkt->data_size) {
188 uint8_t marker = 0xC0 | pkt->channel_id;
189 url_write(h, &marker, 1);
190 }
191 }
192 return 0;
193}
194
195int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
196 int timestamp, int size)
197{
198 pkt->data = av_malloc(size);
199 if (!pkt->data)
200 return AVERROR(ENOMEM);
201 pkt->data_size = size;
202 pkt->channel_id = channel_id;
203 pkt->type = type;
204 pkt->timestamp = timestamp;
205 pkt->extra = 0;
a352b605 206 pkt->ts_delta = 0;
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207
208 return 0;
209}
210
211void ff_rtmp_packet_destroy(RTMPPacket *pkt)
212{
213 if (!pkt)
214 return;
215 av_freep(&pkt->data);
216 pkt->data_size = 0;
217}
218
219int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
220{
221 const uint8_t *base = data;
222
223 if (data >= data_end)
224 return -1;
225 switch (*data++) {
226 case AMF_DATA_TYPE_NUMBER: return 9;
227 case AMF_DATA_TYPE_BOOL: return 2;
228 case AMF_DATA_TYPE_STRING: return 3 + AV_RB16(data);
229 case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
230 case AMF_DATA_TYPE_NULL: return 1;
231 case AMF_DATA_TYPE_ARRAY:
232 data += 4;
233 case AMF_DATA_TYPE_OBJECT:
234 for (;;) {
235 int size = bytestream_get_be16(&data);
236 int t;
237 if (!size) {
238 data++;
239 break;
240 }
241 if (data + size >= data_end || data + size < data)
242 return -1;
243 data += size;
244 t = ff_amf_tag_size(data, data_end);
245 if (t < 0 || data + t >= data_end)
246 return -1;
247 data += t;
248 }
249 return data - base;
250 case AMF_DATA_TYPE_OBJECT_END: return 1;
251 default: return -1;
252 }
253}
254
255int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
256 const uint8_t *name, uint8_t *dst, int dst_size)
257{
258 int namelen = strlen(name);
259 int len;
260
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261 while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
262 len = ff_amf_tag_size(data, data_end);
263 if (len < 0)
264 len = data_end - data;
265 data += len;
266 }
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267 if (data_end - data < 3)
268 return -1;
87ca1b8f 269 data++;
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270 for (;;) {
271 int size = bytestream_get_be16(&data);
272 if (!size)
273 break;
274 if (data + size >= data_end || data + size < data)
275 return -1;
276 data += size;
277 if (size == namelen && !memcmp(data-size, name, namelen)) {
278 switch (*data++) {
279 case AMF_DATA_TYPE_NUMBER:
280 snprintf(dst, dst_size, "%g", av_int2dbl(AV_RB64(data)));
281 break;
282 case AMF_DATA_TYPE_BOOL:
283 snprintf(dst, dst_size, "%s", *data ? "true" : "false");
284 break;
285 case AMF_DATA_TYPE_STRING:
286 len = bytestream_get_be16(&data);
287 av_strlcpy(dst, data, FFMIN(len+1, dst_size));
288 break;
289 default:
290 return -1;
291 }
292 return 0;
293 }
294 len = ff_amf_tag_size(data, data_end);
295 if (len < 0 || data + len >= data_end || data + len < data)
296 return -1;
297 data += len;
298 }
299 return -1;
300}