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examples/dmabuf-capture: simplify event loop and fix style

This commit is contained in:
emersion 2018-05-28 08:37:18 +01:00
parent 85b6b4b0c8
commit 70d324a0f9
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GPG Key ID: 0FDE7BE0E88F5E48
1 changed files with 72 additions and 91 deletions
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163
examples/dmabuf-capture.c
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@ -1,19 +1,17 @@
#define _XOPEN_SOURCE 700 #define _XOPEN_SOURCE 700
#define _POSIX_C_SOURCE 199309L #define _POSIX_C_SOURCE 199309L
#include <libavformat/avformat.h>
#include <libavutil/display.h>
#include <libavutil/hwcontext_drm.h>
#include <libavutil/pixdesc.h>
#include <poll.h> #include <poll.h>
#include <signal.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <signal.h>
#include "wlr-export-dmabuf-unstable-v1-client-protocol.h" #include "wlr-export-dmabuf-unstable-v1-client-protocol.h"
#include <libavformat/avformat.h>
#include <libavutil/pixdesc.h>
#include <libavutil/display.h>
#include <libavutil/hwcontext_drm.h>
struct wayland_output { struct wayland_output {
struct wl_list link; struct wl_list link;
uint32_t id; uint32_t id;
@ -72,7 +70,7 @@ static void output_handle_geometry(void *data, struct wl_output *wl_output,
int32_t subpixel, const char *make, const char *model, int32_t subpixel, const char *make, const char *model,
int32_t transform) { int32_t transform) {
struct wayland_output *output = data; struct wayland_output *output = data;
output->make = av_strdup(make); output->make = av_strdup(make);
output->model = av_strdup(model); output->model = av_strdup(model);
} }
@ -80,8 +78,8 @@ static void output_handle_mode(void *data, struct wl_output *wl_output,
uint32_t flags, int32_t width, int32_t height, int32_t refresh) { uint32_t flags, int32_t width, int32_t height, int32_t refresh) {
if (flags & WL_OUTPUT_MODE_CURRENT) { if (flags & WL_OUTPUT_MODE_CURRENT) {
struct wayland_output *output = data; struct wayland_output *output = data;
output->width = width; output->width = width;
output->height = height; output->height = height;
output->framerate = (AVRational){ refresh, 1000 }; output->framerate = (AVRational){ refresh, 1000 };
} }
} }
@ -96,10 +94,10 @@ static void output_handle_scale(void* data, struct wl_output *wl_output,
} }
static const struct wl_output_listener output_listener = { static const struct wl_output_listener output_listener = {
output_handle_geometry, .geometry = output_handle_geometry,
output_handle_mode, .mode = output_handle_mode,
output_handle_done, .done = output_handle_done,
output_handle_scale, .scale = output_handle_scale,
}; };
static void registry_handle_add(void *data, struct wl_registry *reg, static void registry_handle_add(void *data, struct wl_registry *reg,
@ -109,7 +107,7 @@ static void registry_handle_add(void *data, struct wl_registry *reg,
if (!strcmp(interface, wl_output_interface.name)) { if (!strcmp(interface, wl_output_interface.name)) {
struct wayland_output *output = av_mallocz(sizeof(*output)); struct wayland_output *output = av_mallocz(sizeof(*output));
output->id = id; output->id = id;
output->output = wl_registry_bind(reg, id, &wl_output_interface, 1); output->output = wl_registry_bind(reg, id, &wl_output_interface, 1);
wl_output_add_listener(output->output, &output_listener, output); wl_output_add_listener(output->output, &output_listener, output);
@ -117,8 +115,8 @@ static void registry_handle_add(void *data, struct wl_registry *reg,
} }
if (!strcmp(interface, zwlr_export_dmabuf_manager_v1_interface.name)) { if (!strcmp(interface, zwlr_export_dmabuf_manager_v1_interface.name)) {
ctx->export_manager = wl_registry_bind(reg, id, ctx->export_manager = wl_registry_bind(reg, id,
&zwlr_export_dmabuf_manager_v1_interface, 1); &zwlr_export_dmabuf_manager_v1_interface, 1);
} }
} }
@ -127,15 +125,16 @@ static void remove_output(struct wayland_output *out) {
av_free(out->make); av_free(out->make);
av_free(out->model); av_free(out->model);
av_free(out); av_free(out);
return;
} }
static struct wayland_output *find_output(struct capture_context *ctx, static struct wayland_output *find_output(struct capture_context *ctx,
struct wl_output *out, uint32_t id) { struct wl_output *out, uint32_t id) {
struct wayland_output *output, *tmp; struct wayland_output *output, *tmp;
wl_list_for_each_safe(output, tmp, &ctx->output_list, link) wl_list_for_each_safe(output, tmp, &ctx->output_list, link) {
if ((output->output == out) || (output->id == id)) if ((output->output == out) || (output->id == id)) {
return output; return output;
}
}
return NULL; return NULL;
} }
@ -145,8 +144,8 @@ static void registry_handle_remove(void *data, struct wl_registry *reg,
} }
static const struct wl_registry_listener registry_listener = { static const struct wl_registry_listener registry_listener = {
registry_handle_add, .global = registry_handle_add,
registry_handle_remove, .global_remove = registry_handle_remove,
}; };
static void frame_free(void *opaque, uint8_t *data) { static void frame_free(void *opaque, uint8_t *data) {
@ -192,7 +191,7 @@ static void frame_start(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
/* Set base frame properties */ /* Set base frame properties */
ctx->current_frame = f; ctx->current_frame = f;
f->width = width; f->width = width;
f->height = height; f->height = height;
f->format = AV_PIX_FMT_DRM_PRIME; f->format = AV_PIX_FMT_DRM_PRIME;
@ -219,7 +218,7 @@ static void frame_object(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
AVFrame *f = ctx->current_frame; AVFrame *f = ctx->current_frame;
AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0]; AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0];
desc->objects[index].fd = fd; desc->objects[index].fd = fd;
desc->objects[index].size = size; desc->objects[index].size = size;
} }
@ -231,8 +230,8 @@ static void frame_plane(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0]; AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)f->data[0];
desc->layers[0].planes[index].object_index = object_index; desc->layers[0].planes[index].object_index = object_index;
desc->layers[0].planes[index].offset = offset; desc->layers[0].planes[index].offset = offset;
desc->layers[0].planes[index].pitch = stride; desc->layers[0].planes[index].pitch = stride;
} }
static const uint32_t pixfmt_to_drm_map[] = { static const uint32_t pixfmt_to_drm_map[] = {
@ -278,10 +277,10 @@ static int attach_drm_frames_ref(struct capture_context *ctx, AVFrame *f,
hwfc = (AVHWFramesContext*)ctx->drm_frames_ref->data; hwfc = (AVHWFramesContext*)ctx->drm_frames_ref->data;
hwfc->format = f->format; hwfc->format = f->format;
hwfc->sw_format = sw_format; hwfc->sw_format = sw_format;
hwfc->width = f->width; hwfc->width = f->width;
hwfc->height = f->height; hwfc->height = f->height;
err = av_hwframe_ctx_init(ctx->drm_frames_ref); err = av_hwframe_ctx_init(ctx->drm_frames_ref);
if (err) { if (err) {
@ -421,30 +420,31 @@ static void frame_cancel(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
struct capture_context *ctx = data; struct capture_context *ctx = data;
av_log(ctx, AV_LOG_WARNING, "Frame cancelled!\n"); av_log(ctx, AV_LOG_WARNING, "Frame cancelled!\n");
av_frame_free(&ctx->current_frame); av_frame_free(&ctx->current_frame);
if (reason != ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERNAMENT) if (reason == ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERNAMENT) {
av_log(ctx, AV_LOG_ERROR, "Permanent failure, exiting\n");
ctx->err = 1;
} else {
register_cb(ctx); register_cb(ctx);
}
} }
static const struct zwlr_export_dmabuf_frame_v1_listener frame_listener = { static const struct zwlr_export_dmabuf_frame_v1_listener frame_listener = {
frame_start, .frame = frame_start,
frame_object, .object = frame_object,
frame_plane, .plane = frame_plane,
frame_ready, .ready = frame_ready,
frame_cancel, .cancel = frame_cancel,
}; };
static void register_cb(struct capture_context *ctx) static void register_cb(struct capture_context *ctx) {
{ ctx->frame_callback = zwlr_export_dmabuf_manager_v1_capture_output(
ctx->frame_callback = ctx->export_manager, 0, ctx->target_output);
zwlr_export_dmabuf_manager_v1_capture_output(ctx->export_manager, 0,
ctx->target_output);
zwlr_export_dmabuf_frame_v1_add_listener(ctx->frame_callback, zwlr_export_dmabuf_frame_v1_add_listener(ctx->frame_callback,
&frame_listener, ctx); &frame_listener, ctx);
} }
static int init_lavu_hwcontext(struct capture_context *ctx) { static int init_lavu_hwcontext(struct capture_context *ctx) {
/* DRM hwcontext */ /* DRM hwcontext */
ctx->drm_device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DRM); ctx->drm_device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DRM);
if (!ctx->drm_device_ref) if (!ctx->drm_device_ref)
@ -471,8 +471,7 @@ static int init_lavu_hwcontext(struct capture_context *ctx) {
} }
static int set_hwframe_ctx(struct capture_context *ctx, static int set_hwframe_ctx(struct capture_context *ctx,
AVBufferRef *hw_device_ctx) AVBufferRef *hw_device_ctx) {
{
AVHWFramesContext *frames_ctx = NULL; AVHWFramesContext *frames_ctx = NULL;
int err = 0; int err = 0;
@ -489,10 +488,10 @@ static int set_hwframe_ctx(struct capture_context *ctx,
} }
frames_ctx = (AVHWFramesContext *)(ctx->mapped_frames_ref->data); frames_ctx = (AVHWFramesContext *)(ctx->mapped_frames_ref->data);
frames_ctx->format = cst->valid_hw_formats[0]; frames_ctx->format = cst->valid_hw_formats[0];
frames_ctx->sw_format = ctx->avctx->pix_fmt; frames_ctx->sw_format = ctx->avctx->pix_fmt;
frames_ctx->width = ctx->avctx->width; frames_ctx->width = ctx->avctx->width;
frames_ctx->height = ctx->avctx->height; frames_ctx->height = ctx->avctx->height;
av_hwframe_constraints_free(&cst); av_hwframe_constraints_free(&cst);
@ -545,25 +544,27 @@ static int init_encoding(struct capture_context *ctx) {
if (!ctx->avctx) if (!ctx->avctx)
return 1; return 1;
ctx->avctx->opaque = ctx; ctx->avctx->opaque = ctx;
ctx->avctx->bit_rate = (int)ctx->out_bitrate*1000000.0f; ctx->avctx->bit_rate = (int)ctx->out_bitrate*1000000.0f;
ctx->avctx->pix_fmt = ctx->software_format; ctx->avctx->pix_fmt = ctx->software_format;
ctx->avctx->time_base = (AVRational){ 1, 1000 }; ctx->avctx->time_base = (AVRational){ 1, 1000 };
ctx->avctx->compression_level = 7; ctx->avctx->compression_level = 7;
ctx->avctx->width = find_output(ctx, ctx->target_output, 0)->width; ctx->avctx->width = find_output(ctx, ctx->target_output, 0)->width;
ctx->avctx->height = find_output(ctx, ctx->target_output, 0)->height; ctx->avctx->height = find_output(ctx, ctx->target_output, 0)->height;
if (ctx->avf->oformat->flags & AVFMT_GLOBALHEADER) if (ctx->avf->oformat->flags & AVFMT_GLOBALHEADER) {
ctx->avctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; ctx->avctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}
st->id = 0; st->id = 0;
st->time_base = ctx->avctx->time_base; st->time_base = ctx->avctx->time_base;
st->avg_frame_rate = find_output(ctx, ctx->target_output, 0)->framerate; st->avg_frame_rate = find_output(ctx, ctx->target_output, 0)->framerate;
/* Init hw frames context */ /* Init hw frames context */
err = set_hwframe_ctx(ctx, ctx->mapped_device_ref); err = set_hwframe_ctx(ctx, ctx->mapped_device_ref);
if (err) if (err) {
return err; return err;
}
err = avcodec_open2(ctx->avctx, out_codec, &ctx->encoder_opts); err = avcodec_open2(ctx->avctx, out_codec, &ctx->encoder_opts);
if (err) { if (err) {
@ -616,45 +617,21 @@ static int main_loop(struct capture_context *ctx) {
} }
err = init_lavu_hwcontext(ctx); err = init_lavu_hwcontext(ctx);
if (err) if (err) {
return err; return err;
}
err = init_encoding(ctx); err = init_encoding(ctx);
if (err) if (err) {
return err; return err;
}
/* Start the frame callback */ /* Start the frame callback */
register_cb(ctx); register_cb(ctx);
while (!ctx->err && ctx->quit < 2) { while (wl_display_dispatch(ctx->display) != -1 && !ctx->err &&
while (wl_display_prepare_read(ctx->display) != 0) { ctx->quit < 2) {
wl_display_dispatch_pending(ctx->display); // This space intentionally left blank
}
wl_display_flush(ctx->display);
struct pollfd fds[1] = {
{ .fd = wl_display_get_fd(ctx->display), .events = POLLIN },
};
poll(fds, 1, -1);
if (!(fds[0].revents & POLLIN)) {
wl_display_cancel_read(ctx->display);
}
if (fds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
av_log(ctx, AV_LOG_ERROR, "Error occurred on the display fd!\n");
break;
}
if (fds[0].revents & POLLIN) {
if (wl_display_read_events(ctx->display) < 0) {
av_log(ctx, AV_LOG_ERROR, "Failed to read Wayland events!\n");
break;
}
wl_display_dispatch_pending(ctx->display);
}
} }
err = av_write_trailer(ctx->avf); err = av_write_trailer(ctx->avf);
@ -705,8 +682,9 @@ int main(int argc, char *argv[]) {
}); });
err = init(&ctx); err = init(&ctx);
if (err) if (err) {
goto end; goto end;
}
struct wayland_output *o, *tmp_o; struct wayland_output *o, *tmp_o;
wl_list_for_each_reverse_safe(o, tmp_o, &ctx.output_list, link) { wl_list_for_each_reverse_safe(o, tmp_o, &ctx.output_list, link) {
@ -742,8 +720,9 @@ int main(int argc, char *argv[]) {
av_dict_set(&ctx.encoder_opts, "preset", "veryfast", 0); av_dict_set(&ctx.encoder_opts, "preset", "veryfast", 0);
err = main_loop(&ctx); err = main_loop(&ctx);
if (err) if (err) {
goto end; goto end;
}
end: end:
uninit(&ctx); uninit(&ctx);
@ -752,11 +731,13 @@ end:
static void uninit(struct capture_context *ctx) { static void uninit(struct capture_context *ctx) {
struct wayland_output *output, *tmp_o; struct wayland_output *output, *tmp_o;
wl_list_for_each_safe(output, tmp_o, &ctx->output_list, link) wl_list_for_each_safe(output, tmp_o, &ctx->output_list, link) {
remove_output(output); remove_output(output);
}
if (ctx->export_manager) if (ctx->export_manager) {
zwlr_export_dmabuf_manager_v1_destroy(ctx->export_manager); zwlr_export_dmabuf_manager_v1_destroy(ctx->export_manager);
}
av_buffer_unref(&ctx->drm_frames_ref); av_buffer_unref(&ctx->drm_frames_ref);
av_buffer_unref(&ctx->drm_device_ref); av_buffer_unref(&ctx->drm_device_ref);