* RTP H264 Protocol (RFC3984)
* Copyright (c) 2006 Ryan Martell
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
-* @file
+ * @file
* @brief H.264 / RTP Code (RFC3984)
* @author Ryan Martell <rdm4@martellventures.com>
*
* This currently supports packetization mode:
* Single Nal Unit Mode (0), or
* Non-Interleaved Mode (1). It currently does not support
- * Interleaved Mode (2). (This requires implementing STAP-B, MTAP16, MTAP24, FU-B packet types)
- *
- * @note TODO:
- * 1) RTCP sender reports for udp streams are required..
- *
+ * Interleaved Mode (2). (This requires implementing STAP-B, MTAP16, MTAP24,
+ * FU-B packet types)
*/
#include "libavutil/base64.h"
#include "libavutil/avstring.h"
#include "libavcodec/get_bits.h"
#include "avformat.h"
-#include "mpegts.h"
-#include <unistd.h>
#include "network.h"
#include <assert.h>
#include "rtpdec.h"
-#include "rtpdec_h264.h"
+#include "rtpdec_formats.h"
-/**
- RTP/H264 specific private data.
-*/
struct PayloadContext {
- unsigned long cookie; ///< sanity check, to make sure we get the pointer we're expecting.
-
- //sdp setup parameters
- uint8_t profile_idc; ///< from the sdp setup parameters.
- uint8_t profile_iop; ///< from the sdp setup parameters.
- uint8_t level_idc; ///< from the sdp setup parameters.
- int packetization_mode; ///< from the sdp setup parameters.
+ // sdp setup parameters
+ uint8_t profile_idc;
+ uint8_t profile_iop;
+ uint8_t level_idc;
+ int packetization_mode;
#ifdef DEBUG
int packet_types_received[32];
#endif
};
-#define MAGIC_COOKIE (0xdeadbeef) ///< Cookie for the extradata; to verify we are what we think we are, and that we haven't been freed.
-#define DEAD_COOKIE (0xdeaddead) ///< Cookie for the extradata; once it is freed.
+#ifdef DEBUG
+#define COUNT_NAL_TYPE(data, nal) data->packet_types_received[(nal) & 0x1f]++
+#else
+#define COUNT_NAL_TYPE(data, nal) do { } while (0)
+#endif
+
+static const uint8_t start_sequence[] = { 0, 0, 0, 1 };
-/* ---------------- private code */
-static int sdp_parse_fmtp_config_h264(AVStream * stream,
- PayloadContext * h264_data,
- char *attr, char *value)
+static int sdp_parse_fmtp_config_h264(AVStream *stream,
+ PayloadContext *h264_data,
+ char *attr, char *value)
{
AVCodecContext *codec = stream->codec;
- assert(codec->codec_id == CODEC_ID_H264);
+ assert(codec->codec_id == AV_CODEC_ID_H264);
assert(h264_data != NULL);
if (!strcmp(attr, "packetization-mode")) {
av_log(codec, AV_LOG_DEBUG, "RTP Packetization Mode: %d\n", atoi(value));
h264_data->packetization_mode = atoi(value);
/*
- Packetization Mode:
- 0 or not present: Single NAL mode (Only nals from 1-23 are allowed)
- 1: Non-interleaved Mode: 1-23, 24 (STAP-A), 28 (FU-A) are allowed.
- 2: Interleaved Mode: 25 (STAP-B), 26 (MTAP16), 27 (MTAP24), 28 (FU-A), and 29 (FU-B) are allowed.
+ * Packetization Mode:
+ * 0 or not present: Single NAL mode (Only nals from 1-23 are allowed)
+ * 1: Non-interleaved Mode: 1-23, 24 (STAP-A), 28 (FU-A) are allowed.
+ * 2: Interleaved Mode: 25 (STAP-B), 26 (MTAP16), 27 (MTAP24), 28 (FU-A),
+ * and 29 (FU-B) are allowed.
*/
if (h264_data->packetization_mode > 1)
av_log(codec, AV_LOG_ERROR,
- "Interleaved RTP mode is not supported yet.");
+ "Interleaved RTP mode is not supported yet.\n");
} else if (!strcmp(attr, "profile-level-id")) {
if (strlen(value) == 6) {
char buffer[3];
uint8_t profile_iop;
uint8_t level_idc;
- buffer[0] = value[0]; buffer[1] = value[1]; buffer[2] = '\0';
+ buffer[0] = value[0];
+ buffer[1] = value[1];
+ buffer[2] = '\0';
profile_idc = strtol(buffer, NULL, 16);
- buffer[0] = value[2]; buffer[1] = value[3];
+ buffer[0] = value[2];
+ buffer[1] = value[3];
profile_iop = strtol(buffer, NULL, 16);
- buffer[0] = value[4]; buffer[1] = value[5];
- level_idc = strtol(buffer, NULL, 16);
+ buffer[0] = value[4];
+ buffer[1] = value[5];
+ level_idc = strtol(buffer, NULL, 16);
- // set the parameters...
av_log(codec, AV_LOG_DEBUG,
"RTP Profile IDC: %x Profile IOP: %x Level: %x\n",
profile_idc, profile_iop, level_idc);
h264_data->profile_idc = profile_idc;
h264_data->profile_iop = profile_iop;
- h264_data->level_idc = level_idc;
+ h264_data->level_idc = level_idc;
}
- } else if (!strcmp(attr, "sprop-parameter-sets")) {
- uint8_t start_sequence[]= { 0, 0, 1 };
- codec->extradata_size= 0;
- codec->extradata= NULL;
+ } else if (!strcmp(attr, "sprop-parameter-sets")) {
+ codec->extradata_size = 0;
+ av_freep(&codec->extradata);
while (*value) {
char base64packet[1024];
uint8_t decoded_packet[1024];
- uint32_t packet_size;
+ int packet_size;
char *dst = base64packet;
while (*value && *value != ','
if (*value == ',')
value++;
- packet_size= av_base64_decode(decoded_packet, base64packet, sizeof(decoded_packet));
- if (packet_size) {
+ packet_size = av_base64_decode(decoded_packet, base64packet,
+ sizeof(decoded_packet));
+ if (packet_size > 0) {
uint8_t *dest = av_malloc(packet_size + sizeof(start_sequence) +
- codec->extradata_size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if(dest)
- {
- if(codec->extradata_size)
- {
- // av_realloc?
- memcpy(dest, codec->extradata, codec->extradata_size);
- av_free(codec->extradata);
- }
-
- memcpy(dest+codec->extradata_size, start_sequence, sizeof(start_sequence));
- memcpy(dest+codec->extradata_size+sizeof(start_sequence), decoded_packet, packet_size);
- memset(dest+codec->extradata_size+sizeof(start_sequence)+
- packet_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-
- codec->extradata= dest;
- codec->extradata_size+= sizeof(start_sequence)+packet_size;
- } else {
- av_log(codec, AV_LOG_ERROR, "Unable to allocate memory for extradata!");
+ codec->extradata_size +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!dest) {
+ av_log(codec, AV_LOG_ERROR,
+ "Unable to allocate memory for extradata!\n");
return AVERROR(ENOMEM);
}
+ if (codec->extradata_size) {
+ memcpy(dest, codec->extradata, codec->extradata_size);
+ av_free(codec->extradata);
+ }
+
+ memcpy(dest + codec->extradata_size, start_sequence,
+ sizeof(start_sequence));
+ memcpy(dest + codec->extradata_size + sizeof(start_sequence),
+ decoded_packet, packet_size);
+ memset(dest + codec->extradata_size + sizeof(start_sequence) +
+ packet_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ codec->extradata = dest;
+ codec->extradata_size += sizeof(start_sequence) + packet_size;
}
}
- av_log(codec, AV_LOG_DEBUG, "Extradata set to %p (size: %d)!", codec->extradata, codec->extradata_size);
+ av_log(codec, AV_LOG_DEBUG, "Extradata set to %p (size: %d)!\n",
+ codec->extradata, codec->extradata_size);
}
return 0;
}
-// return 0 on packet, no more left, 1 on packet, 1 on partial packet...
-static int h264_handle_packet(AVFormatContext *ctx,
- PayloadContext *data,
- AVStream *st,
- AVPacket * pkt,
- uint32_t * timestamp,
- const uint8_t * buf,
- int len, int flags)
+// return 0 on packet, no more left, 1 on packet, 1 on partial packet
+static int h264_handle_packet(AVFormatContext *ctx, PayloadContext *data,
+ AVStream *st, AVPacket *pkt, uint32_t *timestamp,
+ const uint8_t *buf, int len, uint16_t seq,
+ int flags)
{
- uint8_t nal = buf[0];
- uint8_t type = (nal & 0x1f);
- int result= 0;
- uint8_t start_sequence[]= {0, 0, 1};
+ uint8_t nal;
+ uint8_t type;
+ int result = 0;
+
+ if (!len) {
+ av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\n");
+ return AVERROR_INVALIDDATA;
+ }
+ nal = buf[0];
+ type = nal & 0x1f;
-#ifdef DEBUG
assert(data);
- assert(data->cookie == MAGIC_COOKIE);
-#endif
assert(buf);
+ /* Simplify the case (these are all the nal types used internally by
+ * the h264 codec). */
if (type >= 1 && type <= 23)
- type = 1; // simplify the case. (these are all the nal types used internally by the h264 codec)
+ type = 1;
switch (type) {
- case 0: // undefined;
- result= -1;
- break;
-
+ case 0: // undefined, but pass them through
case 1:
- av_new_packet(pkt, len+sizeof(start_sequence));
+ av_new_packet(pkt, len + sizeof(start_sequence));
memcpy(pkt->data, start_sequence, sizeof(start_sequence));
- memcpy(pkt->data+sizeof(start_sequence), buf, len);
-#ifdef DEBUG
- data->packet_types_received[nal & 0x1f]++;
-#endif
+ memcpy(pkt->data + sizeof(start_sequence), buf, len);
+ COUNT_NAL_TYPE(data, nal);
break;
case 24: // STAP-A (one packet, multiple nals)
// consume the STAP-A NAL
buf++;
len--;
- // first we are going to figure out the total size....
+ // first we are going to figure out the total size
{
- int pass= 0;
- int total_length= 0;
- uint8_t *dst= NULL;
+ int pass = 0;
+ int total_length = 0;
+ uint8_t *dst = NULL;
- for(pass= 0; pass<2; pass++) {
- const uint8_t *src= buf;
- int src_len= len;
+ for (pass = 0; pass < 2; pass++) {
+ const uint8_t *src = buf;
+ int src_len = len;
- do {
- uint16_t nal_size = AV_RB16(src); // this going to be a problem if unaligned (can it be?)
+ while (src_len > 2) {
+ uint16_t nal_size = AV_RB16(src);
- // consume the length of the aggregate...
- src += 2;
+ // consume the length of the aggregate
+ src += 2;
src_len -= 2;
if (nal_size <= src_len) {
- if(pass==0) {
- // counting...
- total_length+= sizeof(start_sequence)+nal_size;
+ if (pass == 0) {
+ // counting
+ total_length += sizeof(start_sequence) + nal_size;
} else {
// copying
assert(dst);
memcpy(dst, start_sequence, sizeof(start_sequence));
- dst+= sizeof(start_sequence);
+ dst += sizeof(start_sequence);
memcpy(dst, src, nal_size);
-#ifdef DEBUG
- data->packet_types_received[*src & 0x1f]++;
-#endif
- dst+= nal_size;
+ COUNT_NAL_TYPE(data, *src);
+ dst += nal_size;
}
} else {
av_log(ctx, AV_LOG_ERROR,
"nal size exceeds length: %d %d\n", nal_size, src_len);
}
- // eat what we handled...
- src += nal_size;
+ // eat what we handled
+ src += nal_size;
src_len -= nal_size;
if (src_len < 0)
av_log(ctx, AV_LOG_ERROR,
"Consumed more bytes than we got! (%d)\n", src_len);
- } while (src_len > 2); // because there could be rtp padding..
+ }
- if(pass==0) {
- // now we know the total size of the packet (with the start sequences added)
+ if (pass == 0) {
+ /* now we know the total size of the packet (with the
+ * start sequences added) */
av_new_packet(pkt, total_length);
- dst= pkt->data;
+ dst = pkt->data;
} else {
- assert(dst-pkt->data==total_length);
+ assert(dst - pkt->data == total_length);
}
}
}
av_log(ctx, AV_LOG_ERROR,
"Unhandled type (%d) (See RFC for implementation details\n",
type);
- result= -1;
+ result = AVERROR(ENOSYS);
break;
case 28: // FU-A (fragmented nal)
buf++;
- len--; // skip the fu_indicator
- {
- // these are the same as above, we just redo them here for clarity...
- uint8_t fu_indicator = nal;
- uint8_t fu_header = *buf; // read the fu_header.
- uint8_t start_bit = fu_header >> 7;
-// uint8_t end_bit = (fu_header & 0x40) >> 6;
- uint8_t nal_type = (fu_header & 0x1f);
+ len--; // skip the fu_indicator
+ if (len > 1) {
+ // these are the same as above, we just redo them here for clarity
+ uint8_t fu_indicator = nal;
+ uint8_t fu_header = *buf;
+ uint8_t start_bit = fu_header >> 7;
+ uint8_t av_unused end_bit = (fu_header & 0x40) >> 6;
+ uint8_t nal_type = fu_header & 0x1f;
uint8_t reconstructed_nal;
- // reconstruct this packet's true nal; only the data follows..
- reconstructed_nal = fu_indicator & (0xe0); // the original nal forbidden bit and NRI are stored in this packet's nal;
+ // Reconstruct this packet's true nal; only the data follows.
+ /* The original nal forbidden bit and NRI are stored in this
+ * packet's nal. */
+ reconstructed_nal = fu_indicator & 0xe0;
reconstructed_nal |= nal_type;
- // skip the fu_header...
+ // skip the fu_header
buf++;
len--;
-#ifdef DEBUG
if (start_bit)
- data->packet_types_received[nal_type]++;
-#endif
- if(start_bit) {
- // copy in the start sequence, and the reconstructed nal....
- av_new_packet(pkt, sizeof(start_sequence)+sizeof(nal)+len);
+ COUNT_NAL_TYPE(data, nal_type);
+ if (start_bit) {
+ /* copy in the start sequence, and the reconstructed nal */
+ av_new_packet(pkt, sizeof(start_sequence) + sizeof(nal) + len);
memcpy(pkt->data, start_sequence, sizeof(start_sequence));
- pkt->data[sizeof(start_sequence)]= reconstructed_nal;
- memcpy(pkt->data+sizeof(start_sequence)+sizeof(nal), buf, len);
+ pkt->data[sizeof(start_sequence)] = reconstructed_nal;
+ memcpy(pkt->data + sizeof(start_sequence) + sizeof(nal), buf, len);
} else {
av_new_packet(pkt, len);
memcpy(pkt->data, buf, len);
}
+ } else {
+ av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H264 RTP packet\n");
+ result = AVERROR_INVALIDDATA;
}
break;
case 30: // undefined
case 31: // undefined
default:
- av_log(ctx, AV_LOG_ERROR, "Undefined type (%d)", type);
- result= -1;
+ av_log(ctx, AV_LOG_ERROR, "Undefined type (%d)\n", type);
+ result = AVERROR_INVALIDDATA;
break;
}
return result;
}
-/* ---------------- public code */
static PayloadContext *h264_new_context(void)
{
- PayloadContext *data =
- av_mallocz(sizeof(PayloadContext) +
- FF_INPUT_BUFFER_PADDING_SIZE);
-
- if (data) {
- data->cookie = MAGIC_COOKIE;
- }
-
- return data;
+ return av_mallocz(sizeof(PayloadContext) + FF_INPUT_BUFFER_PADDING_SIZE);
}
static void h264_free_context(PayloadContext *data)
}
#endif
- assert(data);
- assert(data->cookie == MAGIC_COOKIE);
-
- // avoid stale pointers (assert)
- data->cookie = DEAD_COOKIE;
-
- // and clear out this...
av_free(data);
}
static int parse_h264_sdp_line(AVFormatContext *s, int st_index,
PayloadContext *h264_data, const char *line)
{
- AVStream *stream = s->streams[st_index];
- AVCodecContext *codec = stream->codec;
+ AVStream *stream;
+ AVCodecContext *codec;
const char *p = line;
- assert(h264_data->cookie == MAGIC_COOKIE);
+ if (st_index < 0)
+ return 0;
+
+ stream = s->streams[st_index];
+ codec = stream->codec;
if (av_strstart(p, "framesize:", &p)) {
char buf1[50];
char *dst = buf1;
- // remove the protocol identifier..
- while (*p && *p == ' ') p++; // strip spaces.
- while (*p && *p != ' ') p++; // eat protocol identifier
- while (*p && *p == ' ') p++; // strip trailing spaces.
- while (*p && *p != '-' && (dst - buf1) < sizeof(buf1) - 1) {
+ // remove the protocol identifier
+ while (*p && *p == ' ')
+ p++; // strip spaces.
+ while (*p && *p != ' ')
+ p++; // eat protocol identifier
+ while (*p && *p == ' ')
+ p++; // strip trailing spaces.
+ while (*p && *p != '-' && (dst - buf1) < sizeof(buf1) - 1)
*dst++ = *p++;
- }
*dst = '\0';
// a='framesize:96 320-240'
- // set our parameters..
- codec->width = atoi(buf1);
- codec->height = atoi(p + 1); // skip the -
- codec->pix_fmt = PIX_FMT_YUV420P;
+ // set our parameters
+ codec->width = atoi(buf1);
+ codec->height = atoi(p + 1); // skip the -
} else if (av_strstart(p, "fmtp:", &p)) {
- char attr[256];
- char value[4096];
-
- // remove the protocol identifier..
- while (*p && *p == ' ') p++; // strip spaces.
- while (*p && *p != ' ') p++; // eat protocol identifier
- while (*p && *p == ' ') p++; // strip trailing spaces.
-
- /* loop on each attribute */
- while (ff_rtsp_next_attr_and_value
- (&p, attr, sizeof(attr), value, sizeof(value))) {
- /* grab the codec extra_data from the config parameter of the fmtp line */
- sdp_parse_fmtp_config_h264(stream, h264_data, attr, value);
- }
+ return ff_parse_fmtp(stream, h264_data, p, sdp_parse_fmtp_config_h264);
} else if (av_strstart(p, "cliprect:", &p)) {
// could use this if we wanted.
}
- return 0; // keep processing it the normal way...
+ return 0;
}
-/**
-This is the structure for expanding on the dynamic rtp protocols (makes everything static. yay!)
-*/
RTPDynamicProtocolHandler ff_h264_dynamic_handler = {
.enc_name = "H264",
.codec_type = AVMEDIA_TYPE_VIDEO,
- .codec_id = CODEC_ID_H264,
+ .codec_id = AV_CODEC_ID_H264,
.parse_sdp_a_line = parse_h264_sdp_line,
- .open = h264_new_context,
- .close = h264_free_context,
+ .alloc = h264_new_context,
+ .free = h264_free_context,
.parse_packet = h264_handle_packet
};
projects / ffmpeg / blobdiff