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GUAC-236: Actually open and init codec. Replace PNG output with stub.

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This commit is contained in:
Michael Jumper 2016-03-10 18:29:03 -08:00
parent a8cba53537
commit 17df235c4e
2 changed files with 48 additions and 12 deletions
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53
src/guacenc/video.c
View File

@ -36,19 +36,47 @@
guacenc_video* guacenc_video_alloc(const char* path, const char* codec_name,
int width, int height, int framerate, int bitrate) {
/* Allocate video structure */
guacenc_video* video = malloc(sizeof(guacenc_video));
if (video == NULL)
return NULL;
/* Pull codec based on name */
AVCodec* codec = avcodec_find_encoder_by_name(codec_name);
if (codec == NULL) {
guacenc_log(GUAC_LOG_ERROR, "Failed to locate codec: \"%s\"",
guacenc_log(GUAC_LOG_ERROR, "Failed to locate codec \"%s\".",
codec_name);
return NULL;
}
/* Retrieve encoding context */
AVCodecContext* context = avcodec_alloc_context3(codec);
if (context == NULL) {
guacenc_log(GUAC_LOG_ERROR, "Failed to allocate context for "
"codec \"%s\".", codec_name);
return NULL;
}
/* Init context with encoding parameters */
context->bit_rate = bitrate;
context->width = width;
context->height = height;
context->time_base = (AVRational) { 1, framerate };
context->gop_size = 10;
context->max_b_frames = 1;
context->pix_fmt = AV_PIX_FMT_YUV420P;
/* Open codec for use */
if (avcodec_open2(context, codec, NULL) < 0) {
guacenc_log(GUAC_LOG_ERROR, "Failed to open codec \"%s\".", codec_name);
avcodec_free_context(&context);
return NULL;
}
/* Allocate video structure */
guacenc_video* video = malloc(sizeof(guacenc_video));
if (video == NULL) {
avcodec_free_context(&context);
return NULL;
}
/* Init properties of video */
video->context = context;
video->width = width;
video->height = height;
video->frame_duration = 1000 / framerate;
@ -81,12 +109,9 @@ static int guacenc_video_flush_frame(guacenc_video* video) {
if (buffer == NULL)
return 0;
/* STUB: Write frame as PNG */
char filename[256];
sprintf(filename, "frame-%012" PRId64 ".png", video->current_time);
cairo_surface_t* surface = buffer->surface;
if (surface != NULL)
cairo_surface_write_to_png(surface, filename);
/* STUB: Write frame to video */
guacenc_log(GUAC_LOG_DEBUG, "Writing frame @ %" PRId64 "ms",
video->current_time);
/* Update internal timestamp */
video->current_time += video->frame_duration;
@ -135,6 +160,10 @@ int guacenc_video_free(guacenc_video* video) {
/* Write final frame */
guacenc_video_flush_frame(video);
/* Clean up encoding context */
avcodec_close(video->context);
avcodec_free_context(&(video->context));
free(video);
return 0;

7
src/guacenc/video.h
View File

@ -27,6 +27,7 @@
#include "buffer.h"
#include <guacamole/timestamp.h>
#include <libavcodec/avcodec.h>
/**
* A video which is actively being encoded. Frames can be added to the video
@ -35,6 +36,12 @@
*/
typedef struct guacenc_video {
/**
* The open encoding context from libavcodec, created for the codec
* specified when this guacenc_video was created.
*/
AVCodecContext* context;
/**
* The width of the video, in pixels.
*/