+
+
+/* -- mkv muxing support ------------------------------------------------- */
+typedef struct
+{
+ mk_Writer *w;
+
+ uint8_t *sps, *pps;
+ int sps_len, pps_len;
+
+ int width, height, d_width, d_height;
+
+ int64_t frame_duration;
+ int fps_num;
+
+ int b_header_written;
+ char b_writing_frame;
+} mkv_t;
+
+static int write_header_mkv( mkv_t *p_mkv )
+{
+ int ret;
+ uint8_t *avcC;
+ int avcC_len;
+
+ if( p_mkv->sps == NULL || p_mkv->pps == NULL ||
+ p_mkv->width == 0 || p_mkv->height == 0 ||
+ p_mkv->d_width == 0 || p_mkv->d_height == 0)
+ return -1;
+
+ avcC_len = 5 + 1 + 2 + p_mkv->sps_len + 1 + 2 + p_mkv->pps_len;
+ avcC = malloc(avcC_len);
+ if (avcC == NULL)
+ return -1;
+
+ avcC[0] = 1;
+ avcC[1] = p_mkv->sps[1];
+ avcC[2] = p_mkv->sps[2];
+ avcC[3] = p_mkv->sps[3];
+ avcC[4] = 0xfe; // nalu size length is three bytes
+ avcC[5] = 0xe1; // one sps
+
+ avcC[6] = p_mkv->sps_len >> 8;
+ avcC[7] = p_mkv->sps_len;
+
+ memcpy(avcC+8, p_mkv->sps, p_mkv->sps_len);
+
+ avcC[8+p_mkv->sps_len] = 1; // one pps
+ avcC[9+p_mkv->sps_len] = p_mkv->pps_len >> 8;
+ avcC[10+p_mkv->sps_len] = p_mkv->pps_len;
+
+ memcpy( avcC+11+p_mkv->sps_len, p_mkv->pps, p_mkv->pps_len );
+
+ ret = mk_writeHeader( p_mkv->w, "x264", "V_MPEG4/ISO/AVC",
+ avcC, avcC_len, p_mkv->frame_duration, 50000,
+ p_mkv->width, p_mkv->height,
+ p_mkv->d_width, p_mkv->d_height );
+
+ free( avcC );
+
+ p_mkv->b_header_written = 1;
+
+ return ret;
+}
+
+static int open_file_mkv( char *psz_filename, hnd_t *p_handle )
+{
+ mkv_t *p_mkv;
+
+ *p_handle = NULL;
+
+ p_mkv = malloc(sizeof(*p_mkv));
+ if (p_mkv == NULL)
+ return -1;
+
+ memset(p_mkv, 0, sizeof(*p_mkv));
+
+ p_mkv->w = mk_createWriter(psz_filename);
+ if (p_mkv->w == NULL)
+ {
+ free(p_mkv);
+ return -1;
+ }
+
+ *p_handle = p_mkv;
+
+ return 0;
+}
+
+static int set_param_mkv( hnd_t handle, x264_param_t *p_param )
+{
+ mkv_t *p_mkv = handle;
+ int64_t dw, dh;
+
+ if( p_param->i_fps_num > 0 )
+ {
+ p_mkv->frame_duration = (int64_t)p_param->i_fps_den *
+ (int64_t)1000000000 / p_param->i_fps_num;
+ p_mkv->fps_num = p_param->i_fps_num;
+ }
+ else
+ {
+ p_mkv->frame_duration = 0;
+ p_mkv->fps_num = 1;
+ }
+
+ p_mkv->width = p_param->i_width;
+ p_mkv->height = p_param->i_height;
+
+ if( p_param->vui.i_sar_width && p_param->vui.i_sar_height )
+ {
+ dw = (int64_t)p_param->i_width * p_param->vui.i_sar_width;
+ dh = (int64_t)p_param->i_height * p_param->vui.i_sar_height;
+ }
+ else
+ {
+ dw = p_param->i_width;
+ dh = p_param->i_height;
+ }
+
+ if( dw > 0 && dh > 0 )
+ {
+ int64_t a = dw, b = dh;
+
+ for (;;)
+ {
+ int64_t c = a % b;
+ if( c == 0 )
+ break;
+ a = b;
+ b = c;
+ }
+
+ dw /= b;
+ dh /= b;
+ }
+
+ p_mkv->d_width = (int)dw;
+ p_mkv->d_height = (int)dh;
+
+ return 0;
+}
+
+static int write_nalu_mkv( hnd_t handle, uint8_t *p_nalu, int i_size )
+{
+ mkv_t *p_mkv = handle;
+ uint8_t type = p_nalu[4] & 0x1f;
+ uint8_t dsize[3];
+ int psize;
+
+ switch( type )
+ {
+ // sps
+ case 0x07:
+ if( !p_mkv->sps )
+ {
+ p_mkv->sps = malloc(i_size - 4);
+ if (p_mkv->sps == NULL)
+ return -1;
+ p_mkv->sps_len = i_size - 4;
+ memcpy(p_mkv->sps, p_nalu + 4, i_size - 4);
+ }
+ break;
+
+ // pps
+ case 0x08:
+ if( !p_mkv->pps )
+ {
+ p_mkv->pps = malloc(i_size - 4);
+ if (p_mkv->pps == NULL)
+ return -1;
+ p_mkv->pps_len = i_size - 4;
+ memcpy(p_mkv->pps, p_nalu + 4, i_size - 4);
+ }
+ break;
+
+ // slice, sei
+ case 0x1:
+ case 0x5:
+ case 0x6:
+ if( !p_mkv->b_writing_frame )
+ {
+ if( mk_startFrame(p_mkv->w) < 0 )
+ return -1;
+ p_mkv->b_writing_frame = 1;
+ }
+ psize = i_size - 4 ;
+ dsize[0] = psize >> 16;
+ dsize[1] = psize >> 8;
+ dsize[2] = psize;
+ if( mk_addFrameData(p_mkv->w, dsize, 3) < 0 ||
+ mk_addFrameData(p_mkv->w, p_nalu + 4, i_size - 4) < 0 )
+ return -1;
+ break;
+
+ default:
+ break;
+ }
+
+ if( !p_mkv->b_header_written && p_mkv->pps && p_mkv->sps &&
+ write_header_mkv(p_mkv) < 0 )
+ return -1;
+
+ return i_size;
+}
+
+static int set_eop_mkv( hnd_t handle, x264_picture_t *p_picture )
+{
+ mkv_t *p_mkv = handle;
+ int64_t i_stamp = (int64_t)(p_picture->i_pts * 1e9 / p_mkv->fps_num);
+
+ p_mkv->b_writing_frame = 0;
+
+ return mk_setFrameFlags( p_mkv->w, i_stamp,
+ p_picture->i_type == X264_TYPE_IDR );
+}
+
+static int close_file_mkv( hnd_t handle )
+{
+ mkv_t *p_mkv = handle;
+ int ret;
+
+ if( p_mkv->sps )
+ free( p_mkv->sps );
+ if( p_mkv->pps )
+ free( p_mkv->pps );
+
+ ret = mk_close(p_mkv->w);
+
+ free( p_mkv );
+
+ return ret;
+}
+