diff options
Diffstat (limited to 'pjmedia/include/pjmedia/types.h')
| -rw-r--r-- | pjmedia/include/pjmedia/types.h | 306 |
1 files changed, 291 insertions, 15 deletions
diff --git a/pjmedia/include/pjmedia/types.h b/pjmedia/include/pjmedia/types.h index e456e34e..a4c71743 100644 --- a/pjmedia/include/pjmedia/types.h +++ b/pjmedia/include/pjmedia/types.h @@ -47,8 +47,8 @@ * @{ */ -/** - * Top most media type. +/** + * Top most media type. */ typedef enum pjmedia_type { @@ -61,7 +61,7 @@ typedef enum pjmedia_type /** The media is video. */ PJMEDIA_TYPE_VIDEO = 2, - /** Unknown media type, in this case the name will be specified in + /** Unknown media type, in this case the name will be specified in * encoding_name. */ PJMEDIA_TYPE_UNKNOWN = 3, @@ -72,8 +72,8 @@ typedef enum pjmedia_type } pjmedia_type; -/** - * Media transport protocol. +/** + * Media transport protocol. */ typedef enum pjmedia_tp_proto { @@ -92,8 +92,8 @@ typedef enum pjmedia_tp_proto } pjmedia_tp_proto; -/** - * Media direction. +/** + * Media direction. */ typedef enum pjmedia_dir { @@ -138,8 +138,8 @@ typedef enum pjmedia_dir (a<<24 | b<<16 | c<<8 | d) -/** - * Opague declaration of media endpoint. +/** + * Opaque declaration of media endpoint. */ typedef struct pjmedia_endpt pjmedia_endpt; @@ -150,7 +150,7 @@ typedef struct pjmedia_endpt pjmedia_endpt; typedef struct pjmedia_stream pjmedia_stream; -/** +/** * Media socket info is used to describe the underlying sockets * to be used as media transport. */ @@ -180,8 +180,84 @@ typedef struct pjmedia_sock_info /** + * Macro for packing format. + */ +#define PJMEDIA_FORMAT_PACK(C1, C2, C3, C4) ( C4<<24 | C3<<16 | C2<<8 | C1 ) + +/** + * This enumeration describes format ID. + */ +typedef enum pjmedia_format_id +{ + /** + * 16bit linear + */ + PJMEDIA_FORMAT_L16 = 0, + + /** + * Alias for PJMEDIA_FORMAT_L16 + */ + PJMEDIA_FORMAT_PCM = PJMEDIA_FORMAT_L16, + + /** + * G.711 ALAW + */ + PJMEDIA_FORMAT_PCMA = PJMEDIA_FORMAT_PACK('A', 'L', 'A', 'W'), + + /** + * Alias for PJMEDIA_FORMAT_PCMA + */ + PJMEDIA_FORMAT_ALAW = PJMEDIA_FORMAT_PCMA, + + /** + * G.711 ULAW + */ + PJMEDIA_FORMAT_PCMU = PJMEDIA_FORMAT_PACK('u', 'L', 'A', 'W'), + + /** + * Aliaw for PJMEDIA_FORMAT_PCMU + */ + PJMEDIA_FORMAT_ULAW = PJMEDIA_FORMAT_PCMU, + + /** + * AMR narrowband + */ + PJMEDIA_FORMAT_AMR = PJMEDIA_FORMAT_PACK(' ', 'A', 'M', 'R'), + + /** + * ITU G.729 + */ + PJMEDIA_FORMAT_G729 = PJMEDIA_FORMAT_PACK('G', '7', '2', '9'), + + /** + * Internet Low Bit-Rate Codec (ILBC) + */ + PJMEDIA_FORMAT_ILBC = PJMEDIA_FORMAT_PACK('I', 'L', 'B', 'C') + +} pjmedia_format_id; + + +/** + * Media format information. + */ +typedef struct pjmedia_format +{ + /** Format ID */ + pjmedia_format_id id; + + /** Bitrate. */ + pj_uint32_t bitrate; + + /** Flag to indicate whether VAD is enabled */ + pj_bool_t vad; + +} pjmedia_format; + + + +/** * This is a general purpose function set PCM samples to zero. - * Since this function is needed by many parts of the library, + * Since this function is needed by many parts of the library, * by putting this functionality in one place, it enables some. * clever people to optimize this function. * @@ -205,7 +281,7 @@ PJ_INLINE(void) pjmedia_zero_samples(pj_int16_t *samples, unsigned count) /** * This is a general purpose function to copy samples from/to buffers with - * equal size. Since this function is needed by many parts of the library, + * equal size. Since this function is needed by many parts of the library, * by putting this functionality in one place, it enables some. * clever people to optimize this function. */ @@ -220,7 +296,7 @@ PJ_INLINE(void) pjmedia_copy_samples(pj_int16_t *dst, const pj_int16_t *src, #else unsigned i; count >>= 1; - for (i=0; i<count; ++i) + for (i=0; i<count; ++i) ((pj_int32_t*)dst)[i] = ((pj_int32_t*)src)[i]; #endif } @@ -228,7 +304,7 @@ PJ_INLINE(void) pjmedia_copy_samples(pj_int16_t *dst, const pj_int16_t *src, /** * This is a general purpose function to copy samples from/to buffers with - * equal size. Since this function is needed by many parts of the library, + * equal size. Since this function is needed by many parts of the library, * by putting this functionality in one place, it enables some. * clever people to optimize this function. */ @@ -243,11 +319,211 @@ PJ_INLINE(void) pjmedia_move_samples(pj_int16_t *dst, const pj_int16_t *src, #else unsigned i; count >>= 1; - for (i=0; i<count; ++i) + for (i=0; i<count; ++i) ((pj_int32_t*)dst)[i] = ((pj_int32_t*)src)[i]; #endif } +/** + * Types of media frame. + */ +typedef enum pjmedia_frame_type +{ + PJMEDIA_FRAME_TYPE_NONE, /**< No frame. */ + PJMEDIA_FRAME_TYPE_AUDIO, /**< Normal audio frame. */ + PJMEDIA_FRAME_TYPE_EXTENDED /**< Extended audio frame. */ + +} pjmedia_frame_type; + + +/** + * This structure describes a media frame. + */ +typedef struct pjmedia_frame +{ + pjmedia_frame_type type; /**< Frame type. */ + void *buf; /**< Pointer to buffer. */ + pj_size_t size; /**< Frame size in bytes. */ + pj_timestamp timestamp; /**< Frame timestamp. */ + pj_uint32_t bit_info; /**< Bit info of the frame, sample case: + a frame may not exactly start and end + at the octet boundary, so this field + may be used for specifying start & + end bit offset. */ +} pjmedia_frame; + + +/** + * The pjmedia_frame_ext is used to carry a more complex audio frames than + * the typical PCM audio frames, and it is signaled by setting the "type" + * field of a pjmedia_frame to PJMEDIA_FRAME_TYPE_EXTENDED. With this set, + * application may typecast pjmedia_frame to pjmedia_frame_ext. + * + * This structure may contain more than one audio frames, which subsequently + * will be called subframes in this structure. The subframes section + * immediately follows the end of this structure, and each subframe is + * represented by pjmedia_frame_ext_subframe structure. Every next + * subframe immediately follows the previous subframe, and all subframes + * are byte-aligned although its payload may not be byte-aligned. + */ + +#pragma pack(1) +typedef struct pjmedia_frame_ext { + pjmedia_frame base; /**< Base frame info */ + pj_uint16_t samples_cnt; /**< Number of samples in this frame */ + pj_uint16_t subframe_cnt; /**< Number of (sub)frames in this frame */ + + /* Zero or more (sub)frames follows immediately after this, + * each will be represented by pjmedia_frame_ext_subframe + */ +} pjmedia_frame_ext; +#pragma pack() + +/** + * This structure represents the individual subframes in the + * pjmedia_frame_ext structure. + */ +#pragma pack(1) +typedef struct pjmedia_frame_ext_subframe { + pj_uint16_t bitlen; /**< Number of bits in the data */ + pj_uint8_t data[1]; /**< Start of encoded data */ +} pjmedia_frame_ext_subframe; + +#pragma pack() + + +/** + * Append one subframe to #pjmedia_frame_ext. + * + * @param frm The #pjmedia_frame_ext. + * @param src Subframe data. + * @param bitlen Lenght of subframe, in bits. + * @param samples_cnt Number of audio samples in subframe. + */ +PJ_INLINE(void) pjmedia_frame_ext_append_subframe(pjmedia_frame_ext *frm, + const void *src, + unsigned bitlen, + unsigned samples_cnt) +{ + pjmedia_frame_ext_subframe *fsub; + pj_uint8_t *p; + unsigned i; + + p = (pj_uint8_t*)frm + sizeof(pjmedia_frame_ext); + for (i = 0; i < frm->subframe_cnt; ++i) { + fsub = (pjmedia_frame_ext_subframe*) p; + p += sizeof(fsub->bitlen) + ((fsub->bitlen+7) >> 3); + } + + fsub = (pjmedia_frame_ext_subframe*) p; + fsub->bitlen = (pj_uint16_t)bitlen; + if (bitlen) + pj_memcpy(fsub->data, src, (bitlen+7) >> 3); + + frm->subframe_cnt++; + frm->samples_cnt = (pj_uint16_t)(frm->samples_cnt + samples_cnt); +} + +/** + * Get a subframe from #pjmedia_frame_ext. + * + * @param frm The #pjmedia_frame_ext. + * @param n Subframe index, zero based. + * + * @return The n-th subframe, or NULL if n is out-of-range. + */ +PJ_INLINE(pjmedia_frame_ext_subframe*) +pjmedia_frame_ext_get_subframe(const pjmedia_frame_ext *frm, unsigned n) +{ + pjmedia_frame_ext_subframe *sf = NULL; + + if (n < frm->subframe_cnt) { + pj_uint8_t *p; + unsigned i; + + p = (pj_uint8_t*)frm + sizeof(pjmedia_frame_ext); + for (i = 0; i < n; ++i) { + sf = (pjmedia_frame_ext_subframe*) p; + p += sizeof(sf->bitlen) + ((sf->bitlen+7) >> 3); + } + + sf = (pjmedia_frame_ext_subframe*) p; + } + + return sf; +} + +/** + * Extract all frame payload to the specified buffer. + * + * @param frm The frame. + * @param dst Destination buffer. + * @param maxsize Maximum size to copy (i.e. the size of the + * destination buffer). + * + * @return Total size of payload copied. + */ +PJ_INLINE(unsigned) +pjmedia_frame_ext_copy_payload(const pjmedia_frame_ext *frm, + void *dst, + unsigned maxlen) +{ + unsigned i, copied=0; + for (i=0; i<frm->subframe_cnt; ++i) { + pjmedia_frame_ext_subframe *sf; + unsigned sz; + + sf = pjmedia_frame_ext_get_subframe(frm, i); + if (!sf) + continue; + + sz = ((sf->bitlen + 7) >> 3); + if (sz + copied > maxlen) + break; + + pj_memcpy(((pj_uint8_t*)dst) + copied, sf->data, sz); + copied += sz; + } + return copied; +} + + +/** + * Pop out first n subframes from #pjmedia_frame_ext. + * + * @param frm The #pjmedia_frame_ext. + * @param n Number of first subframes to be popped out. + * + * @return PJ_SUCCESS when successful. + */ +PJ_INLINE(pj_status_t) +pjmedia_frame_ext_pop_subframes(pjmedia_frame_ext *frm, unsigned n) +{ + pjmedia_frame_ext_subframe *sf; + pj_uint8_t *move_src; + unsigned move_len; + + if (frm->subframe_cnt <= n) { + frm->subframe_cnt = 0; + frm->samples_cnt = 0; + return PJ_SUCCESS; + } + + move_src = (pj_uint8_t*)pjmedia_frame_ext_get_subframe(frm, n); + sf = pjmedia_frame_ext_get_subframe(frm, frm->subframe_cnt-1); + move_len = (pj_uint8_t*)sf - move_src + sizeof(sf->bitlen) + + ((sf->bitlen+7) >> 3); + pj_memmove((pj_uint8_t*)frm+sizeof(pjmedia_frame_ext), + move_src, move_len); + + frm->samples_cnt = (pj_uint16_t) + (frm->samples_cnt - n*frm->samples_cnt/frm->subframe_cnt); + frm->subframe_cnt = (pj_uint16_t) (frm->subframe_cnt - n); + + return PJ_SUCCESS; +} + + /** * @} */ |