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-rw-r--r--audio/filter/af_channels.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/audio/filter/af_channels.c b/audio/filter/af_channels.c
new file mode 100644
index 0000000000..8f676d8cfd
--- /dev/null
+++ b/audio/filter/af_channels.c
@@ -0,0 +1,306 @@
+/*
+ * Audio filter that adds and removes channels, according to the
+ * command line parameter channels. It is stupid and can only add
+ * silence or copy channels, not mix or filter.
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "af.h"
+
+#define FR 0
+#define TO 1
+
+typedef struct af_channels_s{
+ int route[AF_NCH][2];
+ int nr;
+ int router;
+}af_channels_t;
+
+// Local function for copying data
+static void copy(void* in, void* out, int ins, int inos,int outs, int outos, int len, int bps)
+{
+ switch(bps){
+ case 1:{
+ int8_t* tin = (int8_t*)in;
+ int8_t* tout = (int8_t*)out;
+ tin += inos;
+ tout += outos;
+ len = len/ins;
+ while(len--){
+ *tout=*tin;
+ tin +=ins;
+ tout+=outs;
+ }
+ break;
+ }
+ case 2:{
+ int16_t* tin = (int16_t*)in;
+ int16_t* tout = (int16_t*)out;
+ tin += inos;
+ tout += outos;
+ len = len/(2*ins);
+ while(len--){
+ *tout=*tin;
+ tin +=ins;
+ tout+=outs;
+ }
+ break;
+ }
+ case 3:{
+ int8_t* tin = (int8_t*)in;
+ int8_t* tout = (int8_t*)out;
+ tin += 3 * inos;
+ tout += 3 * outos;
+ len = len / ( 3 * ins);
+ while (len--) {
+ tout[0] = tin[0];
+ tout[1] = tin[1];
+ tout[2] = tin[2];
+ tin += 3 * ins;
+ tout += 3 * outs;
+ }
+ break;
+ }
+ case 4:{
+ int32_t* tin = (int32_t*)in;
+ int32_t* tout = (int32_t*)out;
+ tin += inos;
+ tout += outos;
+ len = len/(4*ins);
+ while(len--){
+ *tout=*tin;
+ tin +=ins;
+ tout+=outs;
+ }
+ break;
+ }
+ case 8:{
+ int64_t* tin = (int64_t*)in;
+ int64_t* tout = (int64_t*)out;
+ tin += inos;
+ tout += outos;
+ len = len/(8*ins);
+ while(len--){
+ *tout=*tin;
+ tin +=ins;
+ tout+=outs;
+ }
+ break;
+ }
+ default:
+ mp_msg(MSGT_AFILTER, MSGL_ERR, "[channels] Unsupported number of bytes/sample: %i"
+ " please report this error on the MPlayer mailing list. \n",bps);
+ }
+}
+
+// Make sure the routes are sane
+static int check_routes(af_channels_t* s, int nin, int nout)
+{
+ int i;
+ if((s->nr < 1) || (s->nr > AF_NCH)){
+ mp_msg(MSGT_AFILTER, MSGL_ERR, "[channels] The number of routing pairs must be"
+ " between 1 and %i. Current value is %i\n",AF_NCH,s->nr);
+ return AF_ERROR;
+ }
+
+ for(i=0;i<s->nr;i++){
+ if((s->route[i][FR] >= nin) || (s->route[i][TO] >= nout)){
+ mp_msg(MSGT_AFILTER, MSGL_ERR, "[channels] Invalid routing in pair nr. %i.\n", i);
+ return AF_ERROR;
+ }
+ }
+ return AF_OK;
+}
+
+// Initialization and runtime control
+static int control(struct af_instance* af, int cmd, void* arg)
+{
+ af_channels_t* s = af->setup;
+ switch(cmd){
+ case AF_CONTROL_REINIT:
+
+ // Set default channel assignment
+ if(!s->router){
+ int i;
+ // Make sure this filter isn't redundant
+ if(af->data->nch == ((struct mp_audio*)arg)->nch)
+ return AF_DETACH;
+
+ // If mono: fake stereo
+ if(((struct mp_audio*)arg)->nch == 1){
+ s->nr = min(af->data->nch,2);
+ for(i=0;i<s->nr;i++){
+ s->route[i][FR] = 0;
+ s->route[i][TO] = i;
+ }
+ }
+ else{
+ s->nr = min(af->data->nch, ((struct mp_audio*)arg)->nch);
+ for(i=0;i<s->nr;i++){
+ s->route[i][FR] = i;
+ s->route[i][TO] = i;
+ }
+ }
+ }
+
+ af->data->rate = ((struct mp_audio*)arg)->rate;
+ af->data->format = ((struct mp_audio*)arg)->format;
+ af->data->bps = ((struct mp_audio*)arg)->bps;
+ af->mul = (double)af->data->nch / ((struct mp_audio*)arg)->nch;
+ return check_routes(s,((struct mp_audio*)arg)->nch,af->data->nch);
+ case AF_CONTROL_COMMAND_LINE:{
+ int nch = 0;
+ int n = 0;
+ // Check number of channels and number of routing pairs
+ sscanf(arg, "%i:%i%n", &nch, &s->nr, &n);
+
+ // If router scan commandline for routing pairs
+ if(s->nr){
+ char* cp = &((char*)arg)[n];
+ int ch = 0;
+ // Sanity check
+ if((s->nr < 1) || (s->nr > AF_NCH)){
+ mp_msg(MSGT_AFILTER, MSGL_ERR, "[channels] The number of routing pairs must be"
+ " between 1 and %i. Current value is %i\n",AF_NCH,s->nr);
+ }
+ s->router = 1;
+ // Scan for pairs on commandline
+ while((*cp == ':') && (ch < s->nr)){
+ sscanf(cp, ":%i:%i%n" ,&s->route[ch][FR], &s->route[ch][TO], &n);
+ mp_msg(MSGT_AFILTER, MSGL_V, "[channels] Routing from channel %i to"
+ " channel %i\n",s->route[ch][FR],s->route[ch][TO]);
+ cp = &cp[n];
+ ch++;
+ }
+ }
+
+ if(AF_OK != af->control(af,AF_CONTROL_CHANNELS | AF_CONTROL_SET ,&nch))
+ return AF_ERROR;
+ return AF_OK;
+ }
+ case AF_CONTROL_CHANNELS | AF_CONTROL_SET:
+ // Reinit must be called after this function has been called
+
+ // Sanity check
+ if(((int*)arg)[0] <= 0 || ((int*)arg)[0] > AF_NCH){
+ mp_msg(MSGT_AFILTER, MSGL_ERR, "[channels] The number of output channels must be"
+ " between 1 and %i. Current value is %i\n",AF_NCH,((int*)arg)[0]);
+ return AF_ERROR;
+ }
+
+ af->data->nch=((int*)arg)[0];
+ if(!s->router)
+ mp_msg(MSGT_AFILTER, MSGL_V, "[channels] Changing number of channels"
+ " to %i\n",af->data->nch);
+ return AF_OK;
+ case AF_CONTROL_CHANNELS | AF_CONTROL_GET:
+ *(int*)arg = af->data->nch;
+ return AF_OK;
+ case AF_CONTROL_CHANNELS_ROUTING | AF_CONTROL_SET:{
+ int ch = ((af_control_ext_t*)arg)->ch;
+ int* route = ((af_control_ext_t*)arg)->arg;
+ s->route[ch][FR] = route[FR];
+ s->route[ch][TO] = route[TO];
+ return AF_OK;
+ }
+ case AF_CONTROL_CHANNELS_ROUTING | AF_CONTROL_GET:{
+ int ch = ((af_control_ext_t*)arg)->ch;
+ int* route = ((af_control_ext_t*)arg)->arg;
+ route[FR] = s->route[ch][FR];
+ route[TO] = s->route[ch][TO];
+ return AF_OK;
+ }
+ case AF_CONTROL_CHANNELS_NR | AF_CONTROL_SET:
+ s->nr = *(int*)arg;
+ return AF_OK;
+ case AF_CONTROL_CHANNELS_NR | AF_CONTROL_GET:
+ *(int*)arg = s->nr;
+ return AF_OK;
+ case AF_CONTROL_CHANNELS_ROUTER | AF_CONTROL_SET:
+ s->router = *(int*)arg;
+ return AF_OK;
+ case AF_CONTROL_CHANNELS_ROUTER | AF_CONTROL_GET:
+ *(int*)arg = s->router;
+ return AF_OK;
+ }
+ return AF_UNKNOWN;
+}
+
+// Deallocate memory
+static void uninit(struct af_instance* af)
+{
+ free(af->setup);
+ if (af->data)
+ free(af->data->audio);
+ free(af->data);
+}
+
+// Filter data through filter
+static struct mp_audio* play(struct af_instance* af, struct mp_audio* data)
+{
+ struct mp_audio* c = data; // Current working data
+ struct mp_audio* l = af->data; // Local data
+ af_channels_t* s = af->setup;
+ int i;
+
+ if(AF_OK != RESIZE_LOCAL_BUFFER(af,data))
+ return NULL;
+
+ // Reset unused channels
+ memset(l->audio,0,c->len / c->nch * l->nch);
+
+ if(AF_OK == check_routes(s,c->nch,l->nch))
+ for(i=0;i<s->nr;i++)
+ copy(c->audio,l->audio,c->nch,s->route[i][FR],
+ l->nch,s->route[i][TO],c->len,c->bps);
+
+ // Set output data
+ c->audio = l->audio;
+ c->len = c->len / c->nch * l->nch;
+ c->nch = l->nch;
+
+ return c;
+}
+
+// Allocate memory and set function pointers
+static int af_open(struct af_instance* af){
+ af->control=control;
+ af->uninit=uninit;
+ af->play=play;
+ af->mul=1;
+ af->data=calloc(1,sizeof(struct mp_audio));
+ af->setup=calloc(1,sizeof(af_channels_t));
+ if((af->data == NULL) || (af->setup == NULL))
+ return AF_ERROR;
+ return AF_OK;
+}
+
+// Description of this filter
+struct af_info af_info_channels = {
+ "Insert or remove channels",
+ "channels",
+ "Anders",
+ "",
+ AF_FLAGS_REENTRANT,
+ af_open
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 20:48:40 +0000