add MP3 codec interface
This commit is contained in:
Seven Du
Michael Jerris
parent
1cd9e52b9e
commit
9d635f57ef
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@ -1549,10 +1549,137 @@ static switch_status_t load_config(void)
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return SWITCH_STATUS_SUCCESS;
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}
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/* codec interface */
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struct mp3_context {
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lame_global_flags *gfp;
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};
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static switch_status_t switch_mp3_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
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{
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struct mp3_context *context = NULL;
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int encoding, decoding;
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encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
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decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
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if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct mp3_context))))) {
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return SWITCH_STATUS_FALSE;
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} else {
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const switch_codec_implementation_t *impl = codec->implementation;
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if (codec->fmtp_in) {
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codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
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}
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memset(context, 0, sizeof(struct mp3_context));
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context->gfp = lame_init();
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id3tag_init(context->gfp);
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id3tag_v2_only(context->gfp);
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id3tag_pad_v2(context->gfp);
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lame_set_num_channels(context->gfp, 1);
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lame_set_in_samplerate(context->gfp, impl->actual_samples_per_second);
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lame_set_out_samplerate(context->gfp, impl->actual_samples_per_second);
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if (impl->number_of_channels == 2) {
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lame_set_mode(context->gfp, STEREO);
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} else if (impl->number_of_channels == 1) {
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lame_set_mode(context->gfp, MONO);
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} else {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "%d channels not supported\n", impl->number_of_channels);
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}
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lame_set_brate(context->gfp, 16 * (impl->actual_samples_per_second / 8000) * impl->number_of_channels);
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lame_set_quality(context->gfp, 2);
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lame_set_errorf(context->gfp, log_error);
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lame_set_debugf(context->gfp, log_debug);
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lame_set_msgf(context->gfp, log_msg);
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lame_init_params(context->gfp);
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lame_print_config(context->gfp);
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if (encoding) {
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lame_set_bWriteVbrTag(context->gfp, 0);
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lame_mp3_tags_fid(context->gfp, NULL);
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lame_set_disable_reservoir(context->gfp, 1);
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}
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if (decoding) {
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}
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "MP3 framesize: %d\n", lame_get_framesize(context->gfp));
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codec->private_info = context;
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return SWITCH_STATUS_SUCCESS;
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}
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}
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static switch_status_t switch_mp3_destroy(switch_codec_t *codec)
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{
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struct mp3_context *context = codec->private_info;
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if (context && context->gfp) lame_close(context->gfp);
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codec->private_info = NULL;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_mp3_encode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *decoded_data,
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uint32_t decoded_data_len,
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uint32_t decoded_rate,
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void *encoded_data, uint32_t *encoded_data_len,
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uint32_t *encoded_rate,
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unsigned int *flag)
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{
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struct mp3_context *context = codec->private_info;
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int len;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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if (codec->implementation->number_of_channels == 2) {
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len = lame_encode_buffer_interleaved(context->gfp, decoded_data, decoded_data_len / 4, encoded_data, *encoded_data_len);
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} else {
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len = lame_encode_buffer(context->gfp, decoded_data, NULL, decoded_data_len / 2, encoded_data, *encoded_data_len);
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}
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if (len < 0) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "encode error %d\n", len);
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return SWITCH_STATUS_FALSE;
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}
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*encoded_data_len = len;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_mp3_decode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *encoded_data,
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uint32_t encoded_data_len,
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uint32_t encoded_rate, void *decoded_data, uint32_t *decoded_data_len, uint32_t *decoded_rate,
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unsigned int *flag)
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{
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "decode not implemented!\n");
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return SWITCH_STATUS_FALSE;
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}
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SWITCH_MODULE_LOAD_FUNCTION(mod_shout_load)
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{
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switch_api_interface_t *shout_api_interface;
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switch_file_interface_t *file_interface;
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switch_codec_interface_t *codec_interface;
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int mpf = 10000, spf = 80, bpf = 160, count = 1;
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int RATES[] = {8000, 11025, 16000, 22050, 32000, 44100, 48000};
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int i;
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supported_formats[0] = "shout";
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supported_formats[1] = "mp3";
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@ -1576,6 +1703,42 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_shout_load)
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SWITCH_ADD_API(shout_api_interface, "telecast", "telecast", telecast_api_function, TELECAST_SYNTAX);
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SWITCH_ADD_CODEC(codec_interface, "MP3");
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for (count = 1; count <=4; count++) {
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for (i = 0; i < sizeof(RATES) / sizeof(RATES[0]); i++) {
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switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO,
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98, /* the IANA code number */
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"MP3", /* the IANA code name */
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NULL, /* default fmtp to send (can be overridden by the init function) */
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RATES[i], /* samples transferred per second */
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RATES[i], /* actual samples transferred per second */
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16 * RATES[i] / 8000, /* bits transferred per second */
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mpf * count, /* number of microseconds per frame */
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spf * count * RATES[i] / 8000, /* number of samples per frame */
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bpf * count * RATES[i] / 8000, /* number of bytes per frame decompressed */
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0, /* number of bytes per frame compressed */
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1, /* number of channels represented */
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1, /* number of frames per network packet */
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switch_mp3_init, switch_mp3_encode, switch_mp3_decode, switch_mp3_destroy);
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switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO,
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98, /* the IANA code number */
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"MP3", /* the IANA code name */
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NULL, /* default fmtp to send (can be overridden by the init function) */
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RATES[i], /* samples transferred per second */
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RATES[i], /* actual samples transferred per second */
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16 * RATES[i] / 8000 * 2, /* bits transferred per second */
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mpf * count, /* number of microseconds per frame */
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spf * count * RATES[i] / 8000, /* number of samples per frame */
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bpf * count * RATES[i] / 8000 * 2, /* number of bytes per frame decompressed */
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0, /* number of bytes per frame compressed */
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2, /* number of channels represented */
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1, /* number of frames per network packet */
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switch_mp3_init, switch_mp3_encode, switch_mp3_decode, switch_mp3_destroy);
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}
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}
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/* indicate that the module should continue to be loaded */
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return SWITCH_STATUS_SUCCESS;
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}
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