From 150c9823e71a161e97003849cf8b2f55b21520bd Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 26 Aug 2013 15:10:18 +0100 Subject: adding ffmpeg specific version --- ffmpeg1/libavformat/rtmppkt.h | 288 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 ffmpeg1/libavformat/rtmppkt.h (limited to 'ffmpeg1/libavformat/rtmppkt.h') diff --git a/ffmpeg1/libavformat/rtmppkt.h b/ffmpeg1/libavformat/rtmppkt.h new file mode 100644 index 0000000..a942295 --- /dev/null +++ b/ffmpeg1/libavformat/rtmppkt.h @@ -0,0 +1,288 @@ +/* + * RTMP packet utilities + * Copyright (c) 2009 Kostya Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg 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, + * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVFORMAT_RTMPPKT_H +#define AVFORMAT_RTMPPKT_H + +#include "libavcodec/bytestream.h" +#include "avformat.h" +#include "url.h" + +/** maximum possible number of different RTMP channels */ +#define RTMP_CHANNELS 65599 + +/** + * channels used to for RTMP packets with different purposes (i.e. data, network + * control, remote procedure calls, etc.) + */ +enum RTMPChannel { + RTMP_NETWORK_CHANNEL = 2, ///< channel for network-related messages (bandwidth report, ping, etc) + RTMP_SYSTEM_CHANNEL, ///< channel for sending server control messages + RTMP_SOURCE_CHANNEL, ///< channel for sending a/v to server + RTMP_VIDEO_CHANNEL = 8, ///< channel for video data + RTMP_AUDIO_CHANNEL, ///< channel for audio data +}; + +/** + * known RTMP packet types + */ +typedef enum RTMPPacketType { + RTMP_PT_CHUNK_SIZE = 1, ///< chunk size change + RTMP_PT_BYTES_READ = 3, ///< number of bytes read + RTMP_PT_PING, ///< ping + RTMP_PT_SERVER_BW, ///< server bandwidth + RTMP_PT_CLIENT_BW, ///< client bandwidth + RTMP_PT_AUDIO = 8, ///< audio packet + RTMP_PT_VIDEO, ///< video packet + RTMP_PT_FLEX_STREAM = 15, ///< Flex shared stream + RTMP_PT_FLEX_OBJECT, ///< Flex shared object + RTMP_PT_FLEX_MESSAGE, ///< Flex shared message + RTMP_PT_NOTIFY, ///< some notification + RTMP_PT_SHARED_OBJ, ///< shared object + RTMP_PT_INVOKE, ///< invoke some stream action + RTMP_PT_METADATA = 22, ///< FLV metadata +} RTMPPacketType; + +/** + * possible RTMP packet header sizes + */ +enum RTMPPacketSize { + RTMP_PS_TWELVEBYTES = 0, ///< packet has 12-byte header + RTMP_PS_EIGHTBYTES, ///< packet has 8-byte header + RTMP_PS_FOURBYTES, ///< packet has 4-byte header + RTMP_PS_ONEBYTE ///< packet is really a next chunk of a packet +}; + +/** + * structure for holding RTMP packets + */ +typedef struct RTMPPacket { + int channel_id; ///< RTMP channel ID (nothing to do with audio/video channels though) + RTMPPacketType type; ///< packet payload type + uint32_t timestamp; ///< packet full timestamp + uint32_t ts_delta; ///< timestamp increment to the previous one in milliseconds (latter only for media packets) + uint32_t extra; ///< probably an additional channel ID used during streaming data + uint8_t *data; ///< packet payload + int data_size; ///< packet payload size +} RTMPPacket; + +/** + * Create new RTMP packet with given attributes. + * + * @param pkt packet + * @param channel_id packet channel ID + * @param type packet type + * @param timestamp packet timestamp + * @param size packet size + * @return zero on success, negative value otherwise + */ +int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type, + int timestamp, int size); + +/** + * Free RTMP packet. + * + * @param pkt packet + */ +void ff_rtmp_packet_destroy(RTMPPacket *pkt); + +/** + * Read RTMP packet sent by the server. + * + * @param h reader context + * @param p packet + * @param chunk_size current chunk size + * @param prev_pkt previously read packet headers for all channels + * (may be needed for restoring incomplete packet header) + * @return number of bytes read on success, negative value otherwise + */ +int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p, + int chunk_size, RTMPPacket *prev_pkt); +/** + * Read internal RTMP packet sent by the server. + * + * @param h reader context + * @param p packet + * @param chunk_size current chunk size + * @param prev_pkt previously read packet headers for all channels + * (may be needed for restoring incomplete packet header) + * @param c the first byte already read + * @return number of bytes read on success, negative value otherwise + */ +int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size, + RTMPPacket *prev_pkt, uint8_t c); + +/** + * Send RTMP packet to the server. + * + * @param h reader context + * @param p packet to send + * @param chunk_size current chunk size + * @param prev_pkt previously sent packet headers for all channels + * (may be used for packet header compressing) + * @return number of bytes written on success, negative value otherwise + */ +int ff_rtmp_packet_write(URLContext *h, RTMPPacket *p, + int chunk_size, RTMPPacket *prev_pkt); + +/** + * Print information and contents of RTMP packet. + * + * @param ctx output context + * @param p packet to dump + */ +void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p); + +/** + * @name Functions used to work with the AMF format (which is also used in .flv) + * @see amf_* funcs in libavformat/flvdec.c + * @{ + */ + +/** + * Calculate number of bytes taken by first AMF entry in data. + * + * @param data input data + * @param data_end input buffer end + * @return number of bytes used by first AMF entry + */ +int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end); + +/** + * Retrieve value of given AMF object field in string form. + * + * @param data AMF object data + * @param data_end input buffer end + * @param name name of field to retrieve + * @param dst buffer for storing result + * @param dst_size output buffer size + * @return 0 if search and retrieval succeeded, negative value otherwise + */ +int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end, + const uint8_t *name, uint8_t *dst, int dst_size); + +/** + * Write boolean value in AMF format to buffer. + * + * @param dst pointer to the input buffer (will be modified) + * @param val value to write + */ +void ff_amf_write_bool(uint8_t **dst, int val); + +/** + * Write number in AMF format to buffer. + * + * @param dst pointer to the input buffer (will be modified) + * @param num value to write + */ +void ff_amf_write_number(uint8_t **dst, double num); + +/** + * Write string in AMF format to buffer. + * + * @param dst pointer to the input buffer (will be modified) + * @param str string to write + */ +void ff_amf_write_string(uint8_t **dst, const char *str); + +/** + * Write a string consisting of two parts in AMF format to a buffer. + * + * @param dst pointer to the input buffer (will be modified) + * @param str1 first string to write, may be null + * @param str2 second string to write, may be null + */ +void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2); + +/** + * Write AMF NULL value to buffer. + * + * @param dst pointer to the input buffer (will be modified) + */ +void ff_amf_write_null(uint8_t **dst); + +/** + * Write marker for AMF object to buffer. + * + * @param dst pointer to the input buffer (will be modified) + */ +void ff_amf_write_object_start(uint8_t **dst); + +/** + * Write string used as field name in AMF object to buffer. + * + * @param dst pointer to the input buffer (will be modified) + * @param str string to write + */ +void ff_amf_write_field_name(uint8_t **dst, const char *str); + +/** + * Write marker for end of AMF object to buffer. + * + * @param dst pointer to the input buffer (will be modified) + */ +void ff_amf_write_object_end(uint8_t **dst); + +/** + * Read AMF boolean value. + * + *@param[in,out] gbc GetByteContext initialized with AMF-formatted data + *@param[out] val 0 or 1 + *@return 0 on success or an AVERROR code on failure +*/ +int ff_amf_read_bool(GetByteContext *gbc, int *val); + +/** + * Read AMF number value. + * + *@param[in,out] gbc GetByteContext initialized with AMF-formatted data + *@param[out] val read value + *@return 0 on success or an AVERROR code on failure +*/ +int ff_amf_read_number(GetByteContext *gbc, double *val); + +/** + * Read AMF string value. + * + * Appends a trailing null byte to output string in order to + * ease later parsing. + * + *@param[in,out] gbc GetByteContext initialized with AMF-formatted data + *@param[out] str read string + *@param[in] strsize buffer size available to store the read string + *@param[out] length read string length + *@return 0 on success or an AVERROR code on failure +*/ +int ff_amf_read_string(GetByteContext *gbc, uint8_t *str, + int strsize, int *length); + +/** + * Read AMF NULL value. + * + *@param[in,out] gbc GetByteContext initialized with AMF-formatted data + *@return 0 on success or an AVERROR code on failure +*/ +int ff_amf_read_null(GetByteContext *gbc); + + +/** @} */ // AMF funcs + +#endif /* AVFORMAT_RTMPPKT_H */ -- cgit v1.2.3