AVCodecContext *input_codec_ctx;
AVCodec *input_codec;
int video_index;
- unsigned int i;
int ret;
avdevice_register_all();
av_dump_format(input_format_ctx, 0, input_path, 0);
/* look for the first video_stream */
- video_index = -1;
- for (i = 0; i < input_format_ctx->nb_streams; i++)
- if (input_format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
- video_index = i;
- break;
- }
- if (video_index == -1) {
+ video_index = av_find_best_stream(input_format_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &input_codec, 0);
+ if (video_index < 0) {
fprintf(stderr, "cannot find any video streams\n");
ret = -EINVAL;
goto cleanup;
}
- /* get a pointer to the codec parameters for the video stream */
- input_codec_params = input_format_ctx->streams[video_index]->codecpar;
-
- /* find the decoder for the video stream */
- input_codec = avcodec_find_decoder(input_codec_params->codec_id);
- if (input_codec == NULL) {
- fprintf(stderr, "input_codec is NULL!\n");
- ret = -EINVAL;
- goto cleanup;
- }
-
input_codec_ctx = avcodec_alloc_context3(input_codec);
if (input_codec_ctx == NULL) {
fprintf(stderr, "failed to allocate the input codec context\n");
goto cleanup;
}
+ input_codec_params = input_format_ctx->streams[video_index]->codecpar;
ret = avcodec_parameters_to_context(input_codec_ctx, input_codec_params);
if (ret < 0) {
fprintf(stderr, "cannot copy parameters to input codec context\n");
goto out;
}
- /* Calculate the new output dimension so the original picture is shown
+ /* Calculate the new output dimension so the original frame is shown
* in its entirety */
ret = am7xxx_calc_scaled_image_dimensions(dev,
upscale,
goto out;
}
+ /* YUVJ420P is deprecated in swscaler, but mjpeg still relies on it. */
output_codec_ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
output_codec_ctx->codec_id = AV_CODEC_ID_MJPEG;
output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
goto out;
cleanup:
- avcodec_close(output_codec_ctx);
- av_free(output_codec_ctx);
+ avcodec_free_context(&output_codec_ctx);
out:
return ret;
}
+/*
+ * Wrap the new avcodec API from FFMpeg 3.1 to minimize the changes in the
+ * user code.
+ *
+ * If the use of the wrappers were to be made conditional, a check like the
+ * following could be used:
+ *
+ * #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 48, 101))
+ *
+ * As derived from the APIchanges document:
+ * https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges
+ *
+ * The wrapper implementation has been taken from:
+ * https://blogs.gentoo.org/lu_zero/2016/03/29/new-avcodec-api/
+ */
+static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
+{
+ int ret;
+
+ *got_frame = 0;
+
+ if (pkt) {
+ ret = avcodec_send_packet(avctx, pkt);
+ /*
+ * In particular, we don't expect AVERROR(EAGAIN), because we
+ * read all decoded frames with avcodec_receive_frame() until
+ * done.
+ */
+ if (ret < 0)
+ return ret == AVERROR_EOF ? 0 : ret;
+ }
+
+ ret = avcodec_receive_frame(avctx, frame);
+ if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+ return ret;
+ if (ret >= 0)
+ *got_frame = 1;
+
+ return 0;
+}
+
+static int encode(AVCodecContext *avctx, AVPacket *pkt, int *got_packet, AVFrame *frame)
+{
+ int ret;
+
+ *got_packet = 0;
+
+ ret = avcodec_send_frame(avctx, frame);
+ if (ret < 0)
+ return ret;
+
+ ret = avcodec_receive_packet(avctx, pkt);
+ if (!ret)
+ *got_packet = 1;
+ if (ret == AVERROR(EAGAIN))
+ return 0;
+
+ return ret;
+}
+
+
static int am7xxx_play(const char *input_format_string,
AVDictionary **input_options,
const char *input_path,
{
struct video_input_ctx input_ctx;
struct video_output_ctx output_ctx;
- AVFrame *picture_raw;
- AVFrame *picture_scaled;
+ AVFrame *frame_raw;
+ AVFrame *frame_scaled;
int out_buf_size;
uint8_t *out_buf;
- int out_picture_size;
- uint8_t *out_picture;
+ int out_frame_size;
+ uint8_t *out_frame;
struct SwsContext *sw_scale_ctx;
AVPacket in_packet;
AVPacket out_packet;
- int got_picture;
+ int got_frame;
int got_packet;
int ret;
}
/* allocate an input frame */
- picture_raw = av_frame_alloc();
- if (picture_raw == NULL) {
- fprintf(stderr, "cannot allocate the raw picture frame!\n");
+ frame_raw = av_frame_alloc();
+ if (frame_raw == NULL) {
+ fprintf(stderr, "cannot allocate the raw frame!\n");
ret = -ENOMEM;
goto cleanup_output;
}
/* allocate output frame */
- picture_scaled = av_frame_alloc();
- if (picture_scaled == NULL) {
- fprintf(stderr, "cannot allocate the scaled picture!\n");
+ frame_scaled = av_frame_alloc();
+ if (frame_scaled == NULL) {
+ fprintf(stderr, "cannot allocate the scaled frame!\n");
ret = -ENOMEM;
- goto cleanup_picture_raw;
+ goto cleanup_frame_raw;
}
- picture_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
- picture_scaled->width = (output_ctx.codec_ctx)->width;
- picture_scaled->height = (output_ctx.codec_ctx)->height;
+ frame_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
+ frame_scaled->width = (output_ctx.codec_ctx)->width;
+ frame_scaled->height = (output_ctx.codec_ctx)->height;
/* calculate the bytes needed for the output image and create buffer for the output image */
out_buf_size = av_image_get_buffer_size((output_ctx.codec_ctx)->pix_fmt,
if (out_buf == NULL) {
fprintf(stderr, "cannot allocate output data buffer!\n");
ret = -ENOMEM;
- goto cleanup_picture_scaled;
+ goto cleanup_frame_scaled;
}
- /* assign appropriate parts of buffer to image planes in picture_scaled */
- av_image_fill_arrays(picture_scaled->data,
- picture_scaled->linesize,
+ /* assign appropriate parts of buffer to image planes in frame_scaled */
+ av_image_fill_arrays(frame_scaled->data,
+ frame_scaled->linesize,
out_buf,
(output_ctx.codec_ctx)->pix_fmt,
(output_ctx.codec_ctx)->width,
}
/* decode */
- got_picture = 0;
- ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
+ got_frame = 0;
+ ret = decode(input_ctx.codec_ctx, frame_raw, &got_frame, &in_packet);
if (ret < 0) {
fprintf(stderr, "cannot decode video\n");
run = 0;
}
/* if we got the complete frame */
- if (got_picture) {
- /*
- * Rescaling the picture also changes its pixel format
+ if (got_frame) {
+ /*
+ * Rescaling the frame also changes its pixel format
* to the raw format supported by the projector if
* this was set in video_output_init()
*/
sws_scale(sw_scale_ctx,
- (const uint8_t * const *)picture_raw->data,
- picture_raw->linesize,
+ (const uint8_t * const *)frame_raw->data,
+ frame_raw->linesize,
0,
(input_ctx.codec_ctx)->height,
- picture_scaled->data,
- picture_scaled->linesize);
+ frame_scaled->data,
+ frame_scaled->linesize);
if (output_ctx.raw_output) {
- out_picture = out_buf;
- out_picture_size = out_buf_size;
+ out_frame = out_buf;
+ out_frame_size = out_buf_size;
} else {
- picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
+ frame_scaled->quality = (output_ctx.codec_ctx)->global_quality;
av_init_packet(&out_packet);
out_packet.data = NULL;
out_packet.size = 0;
got_packet = 0;
- ret = avcodec_encode_video2(output_ctx.codec_ctx,
- &out_packet,
- picture_scaled,
- &got_packet);
+ ret = encode(output_ctx.codec_ctx,
+ &out_packet,
+ &got_packet,
+ frame_scaled);
if (ret < 0 || !got_packet) {
fprintf(stderr, "cannot encode video\n");
run = 0;
goto end_while;
}
- out_picture = out_packet.data;
- out_picture_size = out_packet.size;
+ out_frame = out_packet.data;
+ out_frame_size = out_packet.size;
}
#ifdef DEBUG
else
snprintf(filename, NAME_MAX, "out.raw");
file = fopen(filename, "wb");
- fwrite(out_picture, 1, out_picture_size, file);
+ fwrite(out_frame, 1, out_frame_size, file);
fclose(file);
}
#else
image_format,
(output_ctx.codec_ctx)->width,
(output_ctx.codec_ctx)->height,
- out_picture,
- out_picture_size);
+ out_frame,
+ out_frame_size);
if (ret < 0) {
perror("am7xxx_send_image_async");
run = 0;
sws_freeContext(sw_scale_ctx);
cleanup_out_buf:
av_free(out_buf);
-cleanup_picture_scaled:
- av_frame_free(&picture_scaled);
-cleanup_picture_raw:
- av_frame_free(&picture_raw);
+cleanup_frame_scaled:
+ av_frame_free(&frame_scaled);
+cleanup_frame_raw:
+ av_frame_free(&frame_raw);
cleanup_output:
- /* av_free is needed as well,
- * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
+ /* Freeing the codec context is needed as well,
+ * see https://libav.org/documentation/doxygen/master/group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f
*/
avcodec_close(output_ctx.codec_ctx);
- av_free(output_ctx.codec_ctx);
+ avcodec_free_context(&(output_ctx.codec_ctx));
cleanup_input:
avcodec_close(input_ctx.codec_ctx);
projects / libam7xxx.git / blobdiff