From 9f164b45634d380bb6fb15e2e5719547323ab461 Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Fri, 4 Jul 2014 17:41:02 -0400
Subject: Resolution of video can now be changed during call by passing it
 frames with a different resolution.

Added function to change bitrate of video for later use.
---
 toxav/codec.c | 38 ++++++++++++++++++++++++++++++++++++++
 toxav/codec.h |  5 +++++
 toxav/toxav.c |  1 +
 3 files changed, 44 insertions(+)

diff --git a/toxav/codec.c b/toxav/codec.c
index 3e6de803..3664ddd0 100644
--- a/toxav/codec.c
+++ b/toxav/codec.c
@@ -206,6 +206,44 @@ int init_audio_decoder(CodecState *cs, uint32_t audio_channels)
     return 0;
 }
 
+int reconfigure_video_encoder_resolution(CodecState *cs, uint16_t width, uint16_t height)
+{
+    vpx_codec_enc_cfg_t cfg = *cs->v_encoder.config.enc;
+
+    if (cfg.g_w == width && cfg.g_h == height)
+        return 0;
+
+    LOGGER_DEBUG("New video resolution: %u %u", width, height);
+    cfg.g_w = width;
+    cfg.g_h = height;
+    int rc = vpx_codec_enc_config_set(&cs->v_encoder, &cfg);
+
+    if ( rc != VPX_CODEC_OK) {
+        LOGGER_ERROR("Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
+        return -1;
+    }
+
+    return 0;
+}
+
+int reconfigure_video_encoder_bitrate(CodecState *cs, uint32_t video_bitrate)
+{
+    vpx_codec_enc_cfg_t cfg = *cs->v_encoder.config.enc;
+
+    if (cfg.rc_target_bitrate == video_bitrate)
+        return 0;
+
+    LOGGER_DEBUG("New video bitrate: %u", video_bitrate);
+    cfg.rc_target_bitrate = video_bitrate;
+    int rc = vpx_codec_enc_config_set(&cs->v_encoder, &cfg);
+
+    if ( rc != VPX_CODEC_OK) {
+        LOGGER_ERROR("Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
+        return -1;
+    }
+
+    return 0;
+}
 
 int init_video_encoder(CodecState *cs, uint16_t width, uint16_t height, uint32_t video_bitrate)
 {
diff --git a/toxav/codec.h b/toxav/codec.h
index 7ddf2943..d8e9f1a7 100644
--- a/toxav/codec.h
+++ b/toxav/codec.h
@@ -102,6 +102,11 @@ CodecState *codec_init_session ( uint32_t audio_bitrate,
 
 void codec_terminate_session(CodecState *cs);
 
+/* Reconfigure video encoder
+   return 0 on success.
+   return -1 on failure. */
+int reconfigure_video_encoder_resolution(CodecState *cs, uint16_t width, uint16_t height);
+int reconfigure_video_encoder_bitrate(CodecState *cs, uint32_t video_bitrate);
 
 /* Calculate energy and return 1 if has voice, 0 if not */
 int energy_VAD(CodecState *cs, int16_t *PCM, uint16_t frame_size, float energy);
diff --git a/toxav/toxav.c b/toxav/toxav.c
index 82385b95..b97f84ea 100644
--- a/toxav/toxav.c
+++ b/toxav/toxav.c
@@ -640,6 +640,7 @@ inline__ int toxav_prepare_video_frame(ToxAv *av, int32_t call_index, uint8_t *d
 
 
     CallSpecific *call = &av->calls[call_index];
+    reconfigure_video_encoder_resolution(call->cs, input->d_w, input->d_h);
 
     int rc = vpx_codec_encode(&call->cs->v_encoder, input, call->cs->frame_counter, 1, 0, MAX_ENCODE_TIME_US);
 
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