C++ (Cpp) audio_filter_choose_sourceの例

コード例 #1

ファイル: audio_filter.c プロジェクト: dollabi11z/nginx-vod-module

vod_status_t
audio_filter_process(void* context)
{
	audio_filter_state_t* state = context;
	audio_filter_source_t* source;
	u_char* read_buffer;
	uint32_t read_size;
	bool_t processed_data = FALSE;
	vod_status_t rc;
	bool_t frame_done;

	for (;;)
	{
		// choose a source if needed
		if (state->cur_source == NULL)
		{
			rc = audio_filter_choose_source(state, &source);
			if (rc != VOD_OK)
			{
				return rc;
			}

			if (source == NULL)
			{
				// done
				return audio_filter_flush_encoder(state);
			}

			state->cur_source = source;

			// start the frame
			rc = source->cur_frame_part.frames_source->start_frame(
				source->cur_frame_part.frames_source_context, 
				source->cur_frame);
			if (rc != VOD_OK)
			{
				return rc;
			}
		}
		else
		{
			source = state->cur_source;
		}

		// read some data from the frame
		rc = source->cur_frame_part.frames_source->read(
			source->cur_frame_part.frames_source_context,
			&read_buffer,
			&read_size,
			&frame_done);
		if (rc != VOD_OK)
		{
			if (rc != VOD_AGAIN)
			{
				return rc;
			}

			if (!processed_data && !state->first_time)
			{
				vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
					"audio_filter_process: no data was handled, probably a truncated file");
				return VOD_BAD_DATA;
			}

			state->first_time = FALSE;
			return VOD_AGAIN;
		}

		processed_data = TRUE;

		if (!frame_done)
		{
			// didn't finish the frame, append to the frame buffer
			vod_memcpy(state->frame_buffer + state->cur_frame_pos, read_buffer, read_size);
			state->cur_frame_pos += read_size;
			continue;
		}

		if (state->cur_frame_pos != 0)
		{
			// copy the remainder
			vod_memcpy(state->frame_buffer + state->cur_frame_pos, read_buffer, read_size);
			state->cur_frame_pos = 0;
			read_buffer = state->frame_buffer;
		}

		// process the frame
		rc = audio_filter_process_frame(state, read_buffer);
		if (rc != VOD_OK)
		{
			return rc;
		}

		// move to the next frame
		source->cur_frame++;
		state->cur_source = NULL;
	}
}

コード例 #2

ファイル: audio_filter.c プロジェクト: x5u/nginx-vod-module

vod_status_t
audio_filter_process(void* context)
{
	audio_filter_state_t* state = context;
	audio_filter_source_t* source;
	u_char* read_buffer;
	uint32_t read_size;
	uint64_t offset;
	bool_t processed_data = FALSE;
	vod_status_t rc;

	for (;;)
	{
		// choose a source if needed
		if (state->cur_source == NULL)
		{
			rc = audio_filter_choose_source(state, &source);
			if (rc != VOD_OK)
			{
				return rc;
			}

			if (source == NULL)
			{
				// done
				return audio_filter_flush_encoder(state);
			}

			state->cur_source = source;
		}
		else
		{
			source = state->cur_source;
		}

		// read some data from the frame
		offset = *source->cur_frame_offset + state->cur_frame_pos;
		if (!read_cache_get_from_cache(
			state->read_cache_state,
			source->cur_frame->size - state->cur_frame_pos,
			source->cache_slot_id,
			source->frames_source,
			offset,
			&read_buffer,
			&read_size))
		{
			if (!processed_data && !state->first_time)
			{
				vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
					"audio_filter_process: no data was handled, probably a truncated file");
				return VOD_BAD_DATA;
			}

			state->first_time = FALSE;
			return VOD_AGAIN;
		}

		processed_data = TRUE;

		if (state->cur_frame_pos == 0 && read_size >= source->cur_frame->size)
		{
			// have the whole frame in one piece
			rc = audio_filter_process_frame(state, read_buffer);
			if (rc != VOD_OK)
			{
				return rc;
			}

			// move to the next frame
			source->cur_frame++;
			source->cur_frame_offset++;
			state->cur_source = NULL;
			continue;
		}

		if (read_size < source->cur_frame->size - state->cur_frame_pos)
		{
			// didn't finish the frame, append to the frame buffer
			vod_memcpy(state->frame_buffer + state->cur_frame_pos, read_buffer, read_size);
			state->cur_frame_pos += read_size;
			continue;
		}

		// finished the frame
		vod_memcpy(state->frame_buffer + state->cur_frame_pos, read_buffer, source->cur_frame->size - state->cur_frame_pos);

		rc = audio_filter_process_frame(state, state->frame_buffer);
		if (rc != VOD_OK)
		{
			return rc;
		}

		source->cur_frame++;
		source->cur_frame_offset++;
		state->cur_frame_pos = 0;
		state->cur_source = NULL;
	}
}