/*
- * RTP Theora Protocol
+ * Xiph RTP Protocols
+ * Copyright (c) 2009 Colin McQuillian
* Copyright (c) 2010 Josh Allmann
*
* This file is part of FFmpeg.
*/
/**
- * @file libavformat/rtpdec_theora.c
- * @brief Theora / RTP Code
+ * @file
+ * @brief Xiph / RTP Code
+ * @author Colin McQuillan <m.niloc@gmail.com>
* @author Josh Allmann <joshua.allmann@gmail.com>
*/
#include <assert.h>
#include "rtpdec.h"
-#include "rtpdec_xiph.h"
+#include "rtpdec_formats.h"
/**
- * RTP/Theora specific private data.
+ * RTP/Xiph specific private data.
*/
struct PayloadContext {
unsigned ident; ///< 24-bit stream configuration identifier
uint32_t timestamp;
ByteIOContext* fragment; ///< buffer for split payloads
+ uint8_t *split_buf;
+ int split_pos, split_buf_len, split_buf_size;
+ int split_pkts;
};
-static PayloadContext *theora_new_context(void)
+static PayloadContext *xiph_new_context(void)
{
return av_mallocz(sizeof(PayloadContext));
}
}
}
-static void theora_free_context(PayloadContext * data)
+static void xiph_free_context(PayloadContext * data)
{
free_fragment_if_needed(data);
+ av_free(data->split_buf);
av_free(data);
}
-static int theora_handle_packet(AVFormatContext * ctx,
- PayloadContext * data,
- AVStream * st,
- AVPacket * pkt,
- uint32_t * timestamp,
- const uint8_t * buf, int len, int flags)
+static int xiph_handle_packet(AVFormatContext * ctx,
+ PayloadContext * data,
+ AVStream * st,
+ AVPacket * pkt,
+ uint32_t * timestamp,
+ const uint8_t * buf, int len, int flags)
{
int ident, fragmented, tdt, num_pkts, pkt_len;
+ if (!buf) {
+ if (!data->split_buf || data->split_pos + 2 > data->split_buf_len ||
+ data->split_pkts <= 0) {
+ av_log(ctx, AV_LOG_ERROR, "No more data to return\n");
+ return AVERROR_INVALIDDATA;
+ }
+ pkt_len = AV_RB16(data->split_buf + data->split_pos);
+ data->split_pos += 2;
+ if (data->split_pos + pkt_len > data->split_buf_len) {
+ av_log(ctx, AV_LOG_ERROR, "Not enough data to return\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (av_new_packet(pkt, pkt_len)) {
+ av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
+ return AVERROR(ENOMEM);
+ }
+ pkt->stream_index = st->index;
+ memcpy(pkt->data, data->split_buf + data->split_pos, pkt_len);
+ data->split_pos += pkt_len;
+ data->split_pkts--;
+ return data->split_pkts > 0;
+ }
+
if (len < 6) {
av_log(ctx, AV_LOG_ERROR, "Invalid %d byte packet\n", len);
return AVERROR_INVALIDDATA;
}
- // read theora rtp headers
+ // read xiph rtp headers
ident = AV_RB24(buf);
fragmented = buf[3] >> 6;
tdt = (buf[3] >> 4) & 3;
- num_pkts = buf[3] & 7;
+ num_pkts = buf[3] & 0xf;
pkt_len = AV_RB16(buf + 4);
if (pkt_len > len - 6) {
if (ident != data->ident) {
av_log(ctx, AV_LOG_ERROR,
- "Unimplemented Theora SDP configuration change detected\n");
+ "Unimplemented Xiph SDP configuration change detected\n");
return AVERROR_PATCHWELCOME;
}
if (tdt) {
av_log(ctx, AV_LOG_ERROR,
- "Unimplemented RTP Theora packet settings (%d,%d,%d)\n",
+ "Unimplemented RTP Xiph packet settings (%d,%d,%d)\n",
fragmented, tdt, num_pkts);
return AVERROR_PATCHWELCOME;
}
len -= 6;
if (fragmented == 0) {
- // whole frame(s)
- int i, data_len, write_len;
- buf -= 2;
- len += 2;
-
- // fast first pass to calculate total length
- for (i = 0, data_len = 0; (i < num_pkts) && (len >= 2); i++) {
- int off = data_len + (i << 1);
- pkt_len = AV_RB16(buf + off);
- data_len += pkt_len;
- len -= pkt_len + 2;
- }
-
- if (len < 0 || i < num_pkts) {
- av_log(ctx, AV_LOG_ERROR,
- "Bad packet: %d bytes left at frame %d of %d\n",
- len, i, num_pkts);
- return AVERROR_INVALIDDATA;
- }
-
- if (av_new_packet(pkt, data_len)) {
+ if (av_new_packet(pkt, pkt_len)) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
pkt->stream_index = st->index;
-
- // concatenate frames
- for (i = 0, write_len = 0; write_len < data_len; i++) {
- pkt_len = AV_RB16(buf);
- buf += 2;
- memcpy(pkt->data + write_len, buf, pkt_len);
- write_len += pkt_len;
- buf += pkt_len;
+ memcpy(pkt->data, buf, pkt_len);
+ buf += pkt_len;
+ len -= pkt_len;
+ num_pkts--;
+
+ if (num_pkts > 0) {
+ if (len > data->split_buf_size || !data->split_buf) {
+ av_freep(&data->split_buf);
+ data->split_buf_size = 2 * len;
+ data->split_buf = av_malloc(data->split_buf_size);
+ if (!data->split_buf) {
+ av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
+ av_free_packet(pkt);
+ return AVERROR(ENOMEM);
+ }
+ }
+ memcpy(data->split_buf, buf, len);
+ data->split_buf_len = len;
+ data->split_pos = 0;
+ data->split_pkts = num_pkts;
+ return 1;
}
- assert(write_len == data_len);
return 0;
} else if (fragmented == 1) {
- // start of theora data fragment
+ // start of xiph data fragment
int res;
// end packet has been lost somewhere, so drop buffered data
av_log(ctx, AV_LOG_ERROR, "RTP timestamps don't match!\n");
return AVERROR_INVALIDDATA;
}
+ if (!data->fragment) {
+ av_log(ctx, AV_LOG_WARNING,
+ "Received packet without a start fragment; dropping.\n");
+ return AVERROR(EAGAIN);
+ }
// copy data to fragment buffer
put_buffer(data->fragment, buf, pkt_len);
if (fragmented == 3) {
- // end of theora data packet
- uint8_t* theora_data;
- int frame_size = url_close_dyn_buf(data->fragment, &theora_data);
+ // end of xiph data packet
+ av_init_packet(pkt);
+ pkt->size = url_close_dyn_buf(data->fragment, &pkt->data);
- if (frame_size < 0) {
+ if (pkt->size < 0) {
av_log(ctx, AV_LOG_ERROR,
"Error occurred when getting fragment buffer.");
- return frame_size;
- }
-
- if (av_new_packet(pkt, frame_size)) {
- av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
- return AVERROR_NOMEM;
+ return pkt->size;
}
- memcpy(pkt->data, theora_data, frame_size);
pkt->stream_index = st->index;
+ pkt->destruct = av_destruct_packet;
- av_free(theora_data);
data->fragment = NULL;
return 0;
static unsigned int
parse_packed_headers(const uint8_t * packed_headers,
const uint8_t * packed_headers_end,
- AVCodecContext * codec, PayloadContext * theora_data)
+ AVCodecContext * codec, PayloadContext * xiph_data)
{
unsigned num_packed, num_headers, length, length1, length2, extradata_alloc;
if (packed_headers_end - packed_headers < 9) {
av_log(codec, AV_LOG_ERROR,
- "Invalid %d byte packed header.",
+ "Invalid %td byte packed header.",
packed_headers_end - packed_headers);
return AVERROR_INVALIDDATA;
}
num_packed = bytestream_get_be32(&packed_headers);
- theora_data->ident = bytestream_get_be24(&packed_headers);
+ xiph_data->ident = bytestream_get_be24(&packed_headers);
length = bytestream_get_be16(&packed_headers);
num_headers = get_base128(&packed_headers, packed_headers_end);
length1 = get_base128(&packed_headers, packed_headers_end);
if (packed_headers_end - packed_headers != length ||
length1 > length || length2 > length - length1) {
av_log(codec, AV_LOG_ERROR,
- "Bad packed header lengths (%d,%d,%d,%d)\n", length1,
+ "Bad packed header lengths (%d,%d,%td,%d)\n", length1,
length2, packed_headers_end - packed_headers, length);
return AVERROR_INVALIDDATA;
}
ptr = codec->extradata = av_malloc(extradata_alloc);
if (!ptr) {
av_log(codec, AV_LOG_ERROR, "Out of memory\n");
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
*ptr++ = 2;
ptr += av_xiphlacing(ptr, length1);
return 0;
}
-static int theora_parse_fmtp_pair(AVCodecContext * codec,
- PayloadContext *theora_data,
- char *attr, char *value)
+static int xiph_parse_fmtp_pair(AVStream* stream,
+ PayloadContext *xiph_data,
+ char *attr, char *value)
{
+ AVCodecContext *codec = stream->codec;
int result = 0;
if (!strcmp(attr, "sampling")) {
- return AVERROR_PATCHWELCOME;
+ if (!strcmp(value, "YCbCr-4:2:0")) {
+ codec->pix_fmt = PIX_FMT_YUV420P;
+ } else if (!strcmp(value, "YCbCr-4:4:2")) {
+ codec->pix_fmt = PIX_FMT_YUV422P;
+ } else if (!strcmp(value, "YCbCr-4:4:4")) {
+ codec->pix_fmt = PIX_FMT_YUV444P;
+ } else {
+ av_log(codec, AV_LOG_ERROR,
+ "Unsupported pixel format %s\n", attr);
+ return AVERROR_INVALIDDATA;
+ }
} else if (!strcmp(attr, "width")) {
/* This is an integer between 1 and 1048561
* and MUST be in multiples of 16. */
result = parse_packed_headers
(decoded_packet, decoded_packet + packet_size, codec,
- theora_data);
+ xiph_data);
} else {
av_log(codec, AV_LOG_ERROR,
"Out of memory while decoding SDP configuration.\n");
- result = AVERROR_NOMEM;
+ result = AVERROR(ENOMEM);
}
} else {
av_log(codec, AV_LOG_ERROR, "Packet too large\n");
return result;
}
-static int theora_parse_sdp_line(AVFormatContext *s, int st_index,
+static int xiph_parse_sdp_line(AVFormatContext *s, int st_index,
PayloadContext *data, const char *line)
{
const char *p;
- char *value;
- char attr[25];
- int value_size = strlen(line), attr_size = sizeof(attr), res = 0;
- AVCodecContext* codec = s->streams[st_index]->codec;
-
- assert(codec->id == CODEC_ID_THEORA);
- assert(data);
-
- if (!(value = av_malloc(value_size))) {
- av_log(codec, AV_LOG_ERROR, "Out of memory\n");
- return AVERROR_NOMEM;
- }
if (av_strstart(line, "fmtp:", &p)) {
- // remove protocol identifier
- while (*p && *p == ' ') p++; // strip spaces
- while (*p && *p != ' ') p++; // eat protocol identifier
- while (*p && *p == ' ') p++; // strip trailing spaces
-
- while (ff_rtsp_next_attr_and_value(&p,
- attr, attr_size,
- value, value_size)) {
- res = theora_parse_fmtp_pair(codec, data, attr, value);
- if (res < 0 && res != AVERROR_PATCHWELCOME)
- return res;
- }
+ return ff_parse_fmtp(s->streams[st_index], data, p,
+ xiph_parse_fmtp_pair);
}
- av_free(value);
return 0;
}
.enc_name = "theora",
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = CODEC_ID_THEORA,
- .parse_sdp_a_line = theora_parse_sdp_line,
- .open = theora_new_context,
- .close = theora_free_context,
- .parse_packet = theora_handle_packet
+ .parse_sdp_a_line = xiph_parse_sdp_line,
+ .open = xiph_new_context,
+ .close = xiph_free_context,
+ .parse_packet = xiph_handle_packet
+};
+
+RTPDynamicProtocolHandler ff_vorbis_dynamic_handler = {
+ .enc_name = "vorbis",
+ .codec_type = AVMEDIA_TYPE_AUDIO,
+ .codec_id = CODEC_ID_VORBIS,
+ .parse_sdp_a_line = xiph_parse_sdp_line,
+ .open = xiph_new_context,
+ .close = xiph_free_context,
+ .parse_packet = xiph_handle_packet
};
projects / ffmpeg / blobdiff